Radians CEP001 Corded Earplugs — NRR 26
$12.99
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EDITORIAL REVIEW: 4.6/5WC Safety Review — Radians CEP001 Corded Earplugs Best For: corded custom-moldable hearing protection at NRR 26 dB with a retention cord. Not For: non-noise hazards, or noise that earplugs a...
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EDITORIAL REVIEW: 4.6/5WC Safety Review — Radians CEP001 Corded Earplugs
Best For: corded custom-moldable hearing protection at NRR 26 dB with a retention cord.
Not For: non-noise hazards, or noise that earplugs alone can't bring under ~85 dBA (add earmuffs).
Bottom Line: a solid corded custom-moldable plug at NRR 26 dB — the cord earns its keep on jobs where dropped plugs get lost.
Editorial assessment by the WC Safety Editorial Team. Scoring reflects published NRR/specs, fit type, build quality and application fit. WC Safety did not laboratory-test this product.
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Read our hands-on Radians CEP001 review for field-tested buyer notes.
Radians CEP001 Corded Earplugs Overview
The Radians CEP001 Corded Earplugs are corded custom-moldable ear plugs from Radians, rated NRR 26 dB. The permanent cord keeps the pair together so a plug isn’t lost, and lets you hang them around your neck between tasks. Start with our hearing-protection guide and what NRR means, then confirm the noise level you’re protecting against.
The Radians CEP001 belong to the corded ear plugs range. They are reusable and washable across many shifts; for the trade-offs see foam vs reusable ear plugs.
What NRR 26 dB Means
NRR is a laboratory rating; NIOSH suggests derating it for real-world use. Here is how NRR 26 dB lines up with common environments (always confirm with a noise survey):
| Environment | Approx. noise | Fit for NRR? |
|---|---|---|
| Power tools / workshop (~95 dBA) | ~85 dBA after derating | Good fit |
| Heavy equipment / construction (~100 dBA) | ~90 dBA after derating | Add earmuffs |
| Manufacturing / plant floor (~90 dBA) | ~80 dBA after derating | Good fit |
| Firearms / impact (140 dB peak) | Impulse noise | Add earmuffs (dual) |
Who Should Buy the Radians CEP001?
Buy them if you want custom-moldable hearing protection with a retention cord at NRR 26 dB. Consider another plug if you need a different level or style: compare CEP001-R, JP3150 Snug Plugs, FP43 Resistor II. For the highest ratings see highest-NRR ear plugs.
Hearing protection only works when worn correctly for the full exposure. The NRR is a laboratory rating; real-world attenuation is typically lower, so OSHA and NIOSH recommend derating it when estimating protection. For very high noise — or whenever earplugs alone can’t bring exposure under about 85 dBA — wear them with earmuffs (dual protection). The Radians CEP001 reduces noise; it does not eliminate it or protect against non-noise hazards.
Best Applications
Industrial & construction noise
Power tools, plants and construction work at sustained high noise suit a corded NRR 26 plug you won’t lose between tasks.
Shooting & range use
For range and shooting use, pair a high NRR with muffs for impulse noise.
Pros & Cons
Pros
NRR 26 dB protection · corded for loss prevention · washable, reusable · molds to any ear
NRR 26 dB protection · corded for loss prevention · washable, reusable · molds to any ear
Cons
bulkier than uncorded · requires cleaning · cord can snag in some tasks
bulkier than uncorded · requires cleaning · cord can snag in some tasks
Radians CEP001 vs Other Corded Ear Plugs
| Ear plug | NRR / type |
|---|---|
| CEP001-R | NRR 26 · custom-moldable |
| JP3150 Snug Plugs | NRR 26 · reusable flanged |
| FP43 Resistor II | NRR 27 · reusable flanged |
| Snug Plugs | NRR 26 · reusable flanged |
Radians CEP001 vs the Alternatives
How they compare to close options:
- CEP001 vs CEP001-R: CEP001-R is NRR 26 (custom-moldable); the CEP001 is NRR 26 (custom-moldable).
- CEP001 vs JP3150 Snug Plugs: JP3150 Snug Plugs is NRR 26 (reusable flanged); the CEP001 is NRR 26 (custom-moldable).
- CEP001 vs FP43 Resistor II: FP43 Resistor II is NRR 27 (reusable flanged); the CEP001 is NRR 26 (custom-moldable).
Radians CEP001 Quick Answers
Does the cord lower protection?
No — the cord is for retention only; the seal sets the attenuation.
Are the Radians CEP001 washable?
Yes — rinse, dry and reuse.
Plugs or muffs?
Both for the highest noise; see ear plugs vs ear muffs.
Radians CEP001 Specifications
| NRR | 26 dB (EPA / ANSI S3.19) |
| Type | Corded custom-moldable ear plugs |
| Material | thermoplastic/TPE |
| Reuse | Reusable and washable across many shifts |
| Sizing | Molds to any ear |
| Metal-detectable | No |
| Brand | Radians |
Fit & Sizing
The Radians CEP001 are custom-moldable corded ear plugs. To fit them, mold them to your ear once (heat-and-shape), then insert the custom fit — the seal, not just the NRR number, is what protects your hearing. They are molds to any ear and reusable and washable across many shifts. Browse more options in reusable ear plugs, the full corded ear plugs range, or all hearing protection.
Helpful Hearing-Protection Guides
- Best hearing protection
- What NRR (noise reduction rating) means
- Foam vs reusable ear plugs
- Corded vs cordless ear plugs
- Highest-NRR ear plugs
- Ear plugs vs ear muffs
- OSHA hearing conservation (1910.95)
Radians CEP001 Frequently Asked Questions
What is the NRR of the Radians CEP001?
The Radians CEP001 are rated NRR 26 dB (EPA-labeled per ANSI S3.19). Real-world protection is usually lower, so NIOSH recommends derating the NRR when estimating exposure.
Are the Radians CEP001 corded?
Yes. The permanent cord links the pair so you don't lose a plug, and lets you wear them around your neck between tasks — the cord does not change the NRR.
Are the Radians CEP001 reusable or single-use?
They are reusable and washable across many shifts.
How do I insert the Radians CEP001?
To fit them, mold them to your ear once (heat-and-shape), then insert the custom fit. A proper seal is what delivers the rated protection.
Can I wash the Radians CEP001?
Yes — rinse the flanges with mild soap and water, dry, and reuse.
Are the Radians CEP001 metal-detectable?
No. For food or pharma lines where a lost plug must be detectable, see our metal-detectable ear plugs.
What size are the Radians CEP001?
They are molds to any ear.
What noise levels suit NRR 26?
NRR 26 dB suits common industrial noise once derated; for very high or impulse noise, add earmuffs for dual protection. See what NRR means.
Do corded ear plugs reduce the NRR vs uncorded?
No. The cord is only for retention; the plug body and seal determine attenuation.
Are the Radians CEP001 NIOSH/EPA labeled?
Yes — NRR 26 dB is EPA-labeled under ANSI S3.19. WC Safety sells authentic Radians hearing protection through legitimate channels.
Can I buy the Radians CEP001 in bulk or by the case?
Yes. Use the Request a Quote option for case and dispenser pricing on volume orders.
Should I choose ear plugs or ear muffs?
Plugs suit tight spaces, heat and all-day wear; muffs are faster on/off. Many high-noise jobs use both — see ear plugs vs ear muffs.
Written by Steven Eaton, WC Safety Editorial — industrial hearing-protection desk. Reviewed by the WC Safety Editorial Team. NRR and specifications sourced from manufacturer published data (EPA-labeled, ANSI S3.19). Compare the range in corded ear plugs or read our hearing-protection guide.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Follow your written hearing-conservation program and a professional fit/exposure assessment. General information, not medical advice.
Brand / Vendor
Radians
Model / SKU
CEP001-O
Product Type
Ear Plugs
Price
$12.99 (Amazon)
Rating
4.6 / 5 — 10 reviews
Availability
Check current availability on Amazon
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Verified Buyer Reviews
Customer Reviews
★★★★☆4.1 / 5· 1,821 ratings on Amazon
★★★★★
Worked exactly as I'd hoped
Used this kit to create a custom mold for a set of Shure E2 in-ear monitors. If this didn't work, I was in for a $90 trip to the audiologist to make impressions, send the impressions off to a lab to have them fitted for new molds for an additional $150 and then buy a different pair of in-ear monitors that would fit the new molds for at least another $100. YES, for $340 I'd have a superior result, but I like the E2's I already have and for $10... why not? All in all, my results were very good, and I ended up with a set of custom in-ear plugs that with just a little bit of tweaking afterward, block out almost all external sound and give me a very comfortable fit. The sound is great too, with better bass due to a good seal.My approach:Before I started, I grabbed a small prescription bottle to bite on and keep my mouth open while the mix was setting (the only thing I could think of - since I use these for musical performance while singing). Then I set up my phone to start the timer. I made sure to take off the existing sleeve from the in-ears and put the ultra small small fiberglass filter on the end of the sound hole to prevent silicone from getting into the driver. Scotch tape would probably work too. Then I split each jar of putty into 4 equal parts - giving me a total of 4 tries to make a good pair. (You will likely not get it perfect on the first try, so as long as you're resigned to that - you'll do all right). I prepared my in-ears like I was about to put them on. I then did one ear first by mixing the putty and hardener, being careful to fold over each fourth until the mix was one consistent color - or for about 30 to 45 seconds. I then gently placed the mix in one ear and pressed moderately, but not packing it too far into my ear. Lastly, I pushed the in-ear monitor in, like I was wearing it, and then wiggled it a little and smoothed out the edges. I then bit on the prescription bottle to simulate and open mouth and set the timer for 15 minutes, not 10 - and sat as still as I could. I carefully took them out after 15 minutes and did the other ear in the same way. They mixture set well and was very firm after 15 minutes. I set them aside for a few hours, pulled out the in-ear monitors and then used a drill bit to drill the sound hole out. Ultimately though, I needed to use pointed scissors to cut out a small sound hole into my ear from the monitors.The first one came out great, but the second one, the seal was not quite right. I must not have positioned the in-ear monitor properly. No problem, second time, it worked. I used the remaining putty to make some small plugs.I was very happy with this product. Definitely worth a try of $10 for me. Hope this helps someone else.
Verified Purchaser · January 22 · ✓ Amazon Verified Purchase
★★★★★
Do it yourself hearing protectors
I use these for shotgun shooting at the trap and skeet fields at my club, and also for hunting. I've bought these before and they work as well as ones I've had made by the guys who come to our shooting club a couple of times a year. Theirs are better looking with a nice shiny finish on the outside but seem to stop the same amount of sound. These are a lot less expensive. Easy to use and fit. You rub two different color pieces of what looks like putty then stick them in your ears and wait twenty minutes for them to set. There are probably some techniques that the pros use to make them look fancier but these do the job extremely well and as well as the pro versions for sound attenuation.
Verified Purchaser · April 5, 2 · ✓ Amazon Verified Purchase
★★★★☆
Good choice if you are making custom ear cushions for your IEMs
ContextI purchased a used pair of Audeze LCDi3 a few months ago, from a seller who repeated a common complaint about these headphones - they just didn't seem to fit his ears. I bought these in particular because I wanted high-quality, open-back IEMs. I wanted the open-back ones because I use these around the house and while working out, but wanted full situational awareness when doing so, I really don't like losing one of my primary senses. However, when I received them, I found that no matter what I did, or what ear cushions I used, they just didn't feel quite right. I needed both ear cushions and ear-hooks to make them work, and that was finicky, they still tended to fall out. So I decided - rather than spend hundreds of dollars on custom IEM cushions, I'd just make my own.ProcessThe process is very simple. You have two containers, each with one half of the putty. You divide each into two parts, and use one part of each to make one ear cushion, making one cushion first, letting it cure, then making the second. You knead it together for about 90 seconds, then begin forming. It is very pliable at first, and it may even help to let it cure for a minute or two to make it easier to work with, but I was able to form it right after mixing. It sticks in the ear on its own, and I had a little extra left over from each ear, a ball about 4mm across. I allowed for a cure time, in the ear, of 20 minutes, and you can tell its about ready because the extra ball sets up nice and firm, and you can sort of feel the ear cushion "pull away" from the skin of the ear when it is setting up. When it stops doing so, you know its ready.I purchased a total of four sets of Radians, in the peach/flesh tone, to ensure I had plenty of extras to experiment with. The first set I just molded to my ears to make sure I liked the feel of them. They are comfortable, a bit harder when cured than most custom earplugs. Not a big issue, but don't pack it into your ear ridges -too- much or it will be uncomfortable when cured. The second pair I perfected the fit - I filled not only the ear canal, but also the ridge above it, and some of the ridge "forward" of it (closer to the front of the body). I then tried to cut a cylindrical hole for the IEM stem using a 1/4" drill bit (same diameter as the stem), and this worked, but the resulting earbud wasn't very tight and the ear cushion looked pretty rough around the hole. For the third set, I filled some 1/4" heat shrink tubing with epoxy, then formed the earplug around that, ensuring I had a nice, clear shot to the ear canal and the hole was level and aligned. This worked very well, and I am still using the third set today.ReviewThey are quite comfortable. I was worried they'd be hot, or awkward, or unpleasant due to their hardness, but they stay in place very well. They are easy to put in and remove, with a little technique. I can wear them for hours without their bothering me. I can exercise, even doing lifts, sit-ups, push-ups, and pull-ups - without them giving me trouble. Even though they are supporting both the LCDi3 and their bluetooth cable, and thus not an insignificant weight of materials, they are as comfortable as when I was just using them as earplugs.That said, I cannot comment on their ability to block noise, as I do not use them for that purpose. Also, my first two attempts produced ear cushions that were uncomfortable because I didn't include enough of the forward ear ridge to help support them, and I packed it in a bit too tight. So if they do ache or put pressure on your ear for more than an initial couple hour acclimation period, you might want to try again.My only real complaint is that they aren't offered in black.All in all, would recommend for use as custom ear cushions.
Verified Purchaser · February 1 · ✓ Amazon Verified Purchase
★★★★★
Great Custom Molded Hearing Protection.
This is the best hearing protection I own. I've tried dozens of foam, fixed and custom molded earplugs, but keep coming back to these. The molding process is simple and exact. You can buy them in a wide range of colors, although I generally opt for flesh colored.I don't think they are quite as effective at blocking noise as some of the foam plugs I've used, but they are WWWAAAAYYYY more comfortable. And the best hearing protection is the one that you wear. I even sometimes wear them under my WorkTunes for added protection.
Verified Purchaser · May 13, 20 · ✓ Amazon Verified Purchase
★★★★★
Good for non-round ear canals!!
If you look at standard plastic ear plugs they are round and have sealing flanges. So if you are one of those folk whose ear canals are oval shaped or curved or anything but perfectly round standard plugs don't work. In fact they are worse than not working because they produce hotspots.Hotspots are where you put your earplugs in and then after a half hour or so you feel a burning pain like someone is drilling a hole in your ear with a red hot poker. Sometimes you can take the plugs out and sometimes you can't. Anything involving standard ear plugs plus a standard military aviation helmet/visor/oxygen mask produces a situation where not only do you have hot spots but you can't get the plugs out. There is a bone right under the skin of the ear canal where hotspots are the worst. Those little flanges tend to attack that bone first.I nearly forgot to mention foam rubber plugs. They produce fewer hotspots but you have to jam them in to keep them from popping out and then at a crucial time they break their seal and you get an earful of noise. And they itch when you get sweaty.These babies are better!I really wish they'd had these custom molded plugs back when I was in military aviation. If they are this comfortable out in the woods with a chain saw or out in the field on the tractor they'd be great wearing that skin tight aviator's helmet. Sweat doesn't bother them, there are no hotspots and they seem to attenuate ear-damaging high tones more than low pitched sounds.Some words of experience:1) Instructions say to mix half, do one ear and then do the other. Next time I mold a set I'm going to mix both halves, then split in halves and do both ears at the same time.2) Forget the mirror. An ear mirror reflected off the bathroom mirror through the distortion of your bifocals just doesn't work. Plus, unless you have two left hands you can't hold the mirror and shape the left plug. Then you need a spare right hand to do the same on the right. I got a second person with clean hands to help tidy up the outer surface.3) I've bought several pairs of these through Amazon. Beware of one of Amazon's associates "123CloseOut". The one pair I bought from them still hasn't arrived and Amazon tacked on an extra un-advertised shipping charge for these pirates to ship to a PO box.Edited on 11/16/13 to add: All ear plugs of all varieties become uncomfortable if you leave them in long enough, but these less than any others, and less than most headsets. I've had time to wear this set for a couple of extended exposures since I wrote the review. They do start to itch a bit after four hours or so, about as much as foamies do after a half hour. Sweat seems to make them work a bit better, a definite plus. Wearing a radio headset over them is entirely do-able, though I have to turn up the volume to the top to be heard. But that's what they are for, to reduce sound. They work just fine alone, at least as good as any other single set of plugs or headphones I've ever used.
Verified Purchaser · November 8 · ✓ Amazon Verified Purchase
★★★★★
A great way to make custom inserts for your headphones
I'm using these earplugs with a set of Klipsch S4 headphones, accompanied by an older generate iPod Nano. I had previously purchased a set of Bose SIE2i headphones, and while they sounded great, I could not get them to remain fixed in my ear. After a short bit of time on the gym equipment (recumbant bike) they would slowly dislodge, eventually falling out of my ear. The Bose headphones were great, but just not for me.I found the Radian earplugs listed via a Google Search which identified how they could be used along with a standard headset to deliver great sound, fantastic fit, all the while virtually guaranteeing that they will not fall out. So, I figured I would give them a try.To start the process of making these plugs, you mix together the two materials, and insert them into your ear, waiting about 10 - 15 minutes for them to harden. A video that I had watched on the Internet suggested that I insert the tip of the headset into the resin as it was hardening, and let the resin harden with the headphones inserted into it. After they harden for 15 minutes, the video suggested you wait 24 hours, at which time you could use a drill to create channel that went through the entire earplug, allowing the sound to pass from the headphone to your ear canal.I used the video as a guideline and built myself a set of earplugs. What I discovered is that the Video uses the wrong approach to building custom inserts, so here's the right way to do it.Insert the resin into your ear, being careful to smooth the exposed area with your hand so that it looks as presentable as possible. Take the time to remove any imperfections. Do this for both ears. After the earplugs harden for 15 minutes, take them out, and let them sit for 24 hours.At that time, take note of where you want the ear canal to be, and drill a hole from the exposed side of the earplug, through the plug, creating a hole at the point of your ear canal. Be careful to drill this hole so that it is the same size as the stem of your headphones. Some headphones have a stem that has two different widths, so if that is the case, use two different size drills, and drill the 2nd hold only 1/3 or 1/2 of the way to the ear canal so that your headphone will be a tight insert into the earplug.Now, for the review...These earplugs stay put, allow the sound to transfer perfectly to my ear canal, and as a result, can produce very good bass and they sound great across all frequencies. And, they are easy to get out of the ear, but virtually impossible for them to fall out.Perfect!
Verified Purchaser · March 12, · ✓ Amazon Verified Purchase
★★★☆☆
Good Product, Bad Packaging...
Bottom line is that these earplugs work very well, but they are tricky to make, and I think that more material should be provided for the customer to experiment with.First off, the material that one uses to make the earplugs (two different types of putty) has to be taken out of the container it is packaged in, and then each putty has to be divided evenly in half before it is mixed thoroughly with its opposite to activate the curing process. Kind of confusing. Why doesn't it come pre-separated in the correct proportions? This is a simple thing which would have made this a lot easier to use.Then there is the amount of putty in the package. If you follow the instructions you will have exactly enough to make two earplugs. This allows no room for error, or to make another earplug if one doesn't come out very well. At this price, more putty should be supplied.The earplugs I made were quite large in the end, and it would have been nice to try making a smaller set. And though they were kind of tricky to put in, they DID work very well in blocking sound. However, I bought these to be used while sleeping but they were much too big and hard for that-- quite uncomfortable. If I could have made a smaller pair, they might have worked (as is pointed out in other reviews which used half the amount recommended) but in my case, after following the directions there was no putty left.This is a unique and potentially great product which needs better packaging and presentation.
Verified Purchaser · July 11, 2 · ✓ Amazon Verified Purchase
★★★★★
Perfect for shooters who want "bulletproof" noise protection and preservation of hearing.
These were perfect for my needs: I have severe hearing loss, with one ear "severe" and the worse one "Profound" (who knew there was a stage worse than severe!) so I cannot afford to take any chances with my hearing- these are combined with highest rated earmuffs for shooting. I followed the instructions, divided the parts in two, mixed,and poked the middle into the ear canal to fill as deeply into the ear canal as possible for max protection, with a nice thick dome overlying the canal. Well, one had a full impression of my actual eardrum so I know I maxed depth out, but easily trimmed that back a little after they set: no harm done and easy removal.They are easy to insert, comfortable to wear, easy to remove, and I like sore them in an Altoids Tin so they don't get crushed. HIGHGLY RECOMMENDED, AND DON'T BE AFRAID , WHEN MOLDING, TO PRESS DEEPLY AND SLOWLY 3 OR 4 TIMES TO GET WELL INTO YOUR AUDITORY CANALS FOR MAXIMAL NOISE PROTECTION..
Verified Purchaser · February 1 · ✓ Amazon Verified Purchase
★★★★☆
Not super isolating
I bought this to mold some headphone speakers into, to use in my motorcycle helmet. My headphones block out almost all of the wind noise, but get tugged out of my ears easily.I molded these with my mouth propped open, let them sit, and when wearing them, they don't really block out that much noise at all. I'm sure they would prevent hearing damage from loud noises like gun shots or loud machinery, but as far as overall sound isolation, cheap earbuds or just foam plugs are way more effective.Pros: They're incredibly comfortable, easy to get in and out, won't come out unless you want them to.I figured I would have to crank the volume up on my TV while I was sitting waiting for them cure, but I didn't have to turn the TV volume up at all. I knew at that point, they weren't going to do what I wanted.They may be perfect for hearing safety/blocking harmful sound, but they don't seal good enough to "isolate" sound out of your ears.
Verified Purchaser · April 29, · ✓ Amazon Verified Purchase
★★★★★
Great for motorcycles
For motorcycles these are great. If you get them molded right they don’t pull out when you put your helmet on. Best ear protection i have found yet
Verified Purchaser · May 27, 20 · ✓ Amazon Verified Purchase
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