{"product_id":"safebuilder-30db-ear-muffs-hard-hats-type-safety-earmuffs-for-safety-helmet-hear","title":"SAFEBUILDER NRR 27 Cap-Mount Ear Muffs for Hard Hats (Passive, ANSI S3.19)","description":"\u003cdiv class=\"product-description-rich\" style=\"color:#e0e0e0;line-height:1.6;\"\u003e\n\u003cdiv style=\"border:2px solid #ff9800;background:#2a2520;border-radius:8px;padding:18px 22px;margin:0 0 22px;color:#f5e6d3;\"\u003e\n\u003cdiv style=\"margin-bottom:10px;\"\u003e\n\u003cspan style=\"background:#ff9800;color:#1a1a1a;font-weight:bold;padding:4px 12px;border-radius:4px;\"\u003eEDITORIAL REVIEW: 4.5\/5\u003c\/span\u003e \u003cspan style=\"color:#ffb74d;\"\u003eWC Safety Review — SAFEBUILDER 30dB Ear Muffs Hard Hats Type Safety Earmuffs For Safety Helmet Hearing Protection Earmuffs ANSI S3.19 (Blac\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:0.9em;color:#cbb89e;margin:6px 0 0;\"\u003eEditorial assessment by the WC Safety Editorial Team, based on published SAFEBUILDER specifications and category fit. We did not laboratory-test this product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:6px 0 16px;\"\u003e\u003ca href=\"\/collections\/ear-muffs\" style=\"display:inline-block;background:#ff9800;color:#1a1a1a;padding:11px 20px;text-decoration:none;font-weight:bold;border-radius:4px;margin-left:8px;\"\u003eSHOP EAR MUFFS →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eSAFEBUILDER NRR 27 Cap-Mount Ear Muffs for Hard Hats (Passive, ANSI S3.19) Overview\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eSAFEBUILDER cap-mount ear muffs\u003c\/strong\u003e are passive hearing protectors designed to clip into the side accessory slots of a slotted hard hat, putting \u003cstrong\u003eNRR 27 (ANSI S3.19)\u003c\/strong\u003e attenuation on workers who already wear head protection. These are \u003cstrong\u003ecap-mount muffs for hard hats\u003c\/strong\u003e, not over-the-head muffs and not behind-the-neck muffs — the arms slide into the helmet's 30 mm accessory channels and the cups swing down over your ears when you need them and lift away when you don't.\u003c\/p\u003e\n\u003cp\u003eAlthough the listing markets a \"30dB\" figure, the verified rating for this model is \u003cstrong\u003eNRR 27\u003c\/strong\u003e, and that is the number to plan around. Like every passive muff, the lab NRR overstates field performance. OSHA and NIOSH both advise derating the label: a common approach is to subtract 7 dB and halve the result, so an NRR 27 muff realistically delivers protection closer to the low double digits at the ear in real industrial use. That still covers a broad range of construction and plant noise, but on the very loudest impulse work you should pair muffs with plugs for dual protection. For a walk-through of the math, see \u003ca href=\"\/blogs\/how-to-guide\/how-to-calculate-the-nrr-you-need\"\u003ehow to calculate NRR\u003c\/a\u003e and our explainer on \u003ca href=\"\/blogs\/guides\/what-is-nrr-noise-reduction-rating-explained\"\u003ewhat is NRR\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eBecause they are passive, these muffs have no microphones, no sound amplification, and no AM\/FM or Bluetooth — they simply block noise. If you need to hear range commands or amplified low-level sound, look at \u003ca href=\"\/collections\/electronic-ear-muffs\"\u003eelectronic ear muffs\u003c\/a\u003e instead. If you want to compare with standard over-the-head and folding options, browse all \u003ca href=\"\/collections\/ear-muffs\"\u003eear muffs\u003c\/a\u003e or the wider \u003ca href=\"\/collections\/hearing-protection\"\u003ehearing protection\u003c\/a\u003e range. Employers managing noise exposure should review the hearing-conservation thresholds in \u003ca href=\"\/blogs\/guides\/what-is-osha-29-cfr-1910-95-hearing-conservation\"\u003eOSHA 1910.95\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eWhat It Is Built For\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:12px 0;background:#1a1a1a;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"color:#ffb74d;text-align:left;padding:8px;border:1px solid #444;\"\u003eUse case\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;text-align:left;padding:8px;border:1px solid #444;\"\u003eFit\u003c\/th\u003e\n\u003cth style=\"color:#ffb74d;text-align:left;padding:8px;border:1px solid #444;\"\u003eBuyer guidance\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eHard-hat work with slotted helmet\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eIdeal\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eDesigned for this — arms clip into the 30 mm slots so you keep head and hearing protection together without removing the helmet.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eGeneral construction and plant noise\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eStrong\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eNRR 27 (derated) covers most moderate-to-loud industrial noise; confirm exposure against your OSHA noise survey.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eOver-the-head use without a helmet\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eNot suitable\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eThese are cap-mount only; for bare-head use choose an over-the-head muff from the ear muffs collection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eShooting range \/ hearing situational commands\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eWeak\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003ePassive muffs block all sound equally; for range communication use electronic ear muffs that amplify speech.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eLoudest impulse or sustained high-dBA tasks\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003ePair with plugs\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eFor exposures above what NRR 27 derated can cover, add foam plugs for dual protection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"background:#1a2733;border-left:4px solid #4fc3f7;padding:12px 16px;color:#cfd8dc;\"\u003eEarmuffs reduce noise, but the labeled NRR is a laboratory number — real-world protection is lower (NIOSH and OSHA both derate it). The muff only protects if the cushions seal fully around the ear: long hair, eyeglass temples, and gaps under a hard-hat-mounted muff all break the seal. In very high noise, wear muffs and earplugs together (dual protection). Electronic muffs amplify quiet sounds and cut loud impulses but still protect only to their rated NRR. OSHA \u003ca href=\"\/blogs\/guides\/what-is-osha-29-cfr-1910-95-hearing-conservation\" style=\"color:#4fc3f7;\"\u003e29 CFR 1910.95\u003c\/a\u003e sets the 85 dBA action level; size protection to your measured noise — see \u003ca href=\"\/blogs\/how-to-guide\/how-to-calculate-the-nrr-you-need\" style=\"color:#4fc3f7;\"\u003ehow to calculate the NRR you need\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;gap:12px;flex-wrap:wrap;margin:14px 0;\"\u003e\n\u003cdiv style=\"flex:1;min-width:220px;background:#1b3a2a;border:1px solid #4caf50;color:#e8f5e9;padding:10px 14px;border-radius:4px;\"\u003e\n\u003cstrong style=\"color:#81c784;\"\u003ePros\u003c\/strong\u003e\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003eCap-mount arms clip directly into slotted hard-hat accessory channels, keeping head and hearing protection on one unit\u003c\/li\u003e\n\u003cli\u003eNRR 27 passive rating (ANSI S3.19) suits a broad range of construction and industrial noise\u003c\/li\u003e\n\u003cli\u003eNo batteries, electronics, or charging — nothing to fail mid-shift\u003c\/li\u003e\n\u003cli\u003eCups swing down to seal and lift up out of the way when noise drops\u003c\/li\u003e\n\u003cli\u003eSimple, low-cost protection for crews that already wear slotted helmets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:220px;background:#3a1e1e;border:1px solid #ef5350;color:#ffebee;padding:10px 14px;border-radius:4px;\"\u003e\n\u003cstrong style=\"color:#e57373;\"\u003eCons\u003c\/strong\u003e\u003cul style=\"padding-left:20px;\"\u003e\n\u003cli\u003eCap-mount only — will not work over a bare head or with non-slotted helmets\u003c\/li\u003e\n\u003cli\u003ePassive design blocks all sound, so it does not let you hear speech or commands like electronic muffs do\u003c\/li\u003e\n\u003cli\u003eReal-world attenuation is lower than the NRR 27 label once derated per OSHA\/NIOSH\u003c\/li\u003e\n\u003cli\u003eListing markets a 30dB figure that does not match the verified NRR 27 rating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eHow It Compares\u003c\/h2\u003e\n\u003cdiv\u003e\u003cp\u003eWithin cap-mount hard-hat muffs, SAFEBUILDER sits in the mid-attenuation passive tier. The \u003ca href=\"\/products\/radians-def-guard-23-earmuff-red\"\u003eRadians Def-Guard 23 earmuff\u003c\/a\u003e is a lower-rated passive option for lighter noise, while \u003ca href=\"\/products\/moldex-mx-6-over-the-head-earmuffs-blackgreen-large-6130\"\u003eMoldex MX-6 over-the-head earmuffs\u003c\/a\u003e cover bare-head workers who do not wear a slotted helmet. If your crew needs to hear voices or commands while protected, step up to an electronic model such as the \u003ca href=\"\/products\/howard-leight-impact-sport-electronic-ear-muffs\"\u003eHoward Leight Impact Sport electronic ear muffs\u003c\/a\u003e — but expect to pay more and manage batteries. Compare cap-mount, over-the-head, and folding designs side by side in our \u003ca href=\"\/blogs\/guides\/best-passive-ear-muffs\"\u003ebest passive ear muffs\u003c\/a\u003e guide.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:12px 0;background:#1a1a1a;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eNoise Reduction Rating (NRR)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003e27 dB (ANSI S3.19)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eForm factor\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eCap-mount (clips to slotted hard hat)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eTechnology\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003ePassive (no electronics)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eAmplification \/ Bluetooth\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eCap-mount compatible\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eYes — fits standard 30 mm helmet accessory slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eSAFEBUILDER\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eANSI S3.19\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;color:#ffb74d;\"\u003eIntended use\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #444;\"\u003eConstruction \/ industrial slotted-helmet work\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eRelated Resources\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/ear-muffs\" style=\"color:#4fc3f7;\"\u003eear muffs\u003c\/a\u003e \u003ca href=\"\/collections\/electronic-ear-muffs\" style=\"color:#4fc3f7;\"\u003eelectronic ear muffs\u003c\/a\u003e \u003ca href=\"\/collections\/hearing-protection\" style=\"color:#4fc3f7;\"\u003ehearing protection\u003c\/a\u003e \u003ca href=\"\/collections\/noise-canceling-headsets\" style=\"color:#4fc3f7;\"\u003enoise-canceling headsets\u003c\/a\u003e \u003ca href=\"\/blogs\/guides\/best-passive-ear-muffs\" style=\"color:#4fc3f7;\"\u003ebest passive ear muffs\u003c\/a\u003e \u003ca href=\"\/blogs\/guides\/best-electronic-ear-muffs-for-shooting\" style=\"color:#4fc3f7;\"\u003ebest electronic ear muffs\u003c\/a\u003e \u003ca href=\"\/blogs\/guides\/ear-plugs-vs-ear-muffs\" style=\"color:#4fc3f7;\"\u003eear plugs vs ear muffs\u003c\/a\u003e \u003ca href=\"\/blogs\/how-to-guide\/how-to-calculate-the-nrr-you-need\" style=\"color:#4fc3f7;\"\u003ehow to calculate NRR\u003c\/a\u003e \u003ca href=\"\/blogs\/guides\/what-is-nrr-noise-reduction-rating-explained\" style=\"color:#4fc3f7;\"\u003ewhat is NRR\u003c\/a\u003e \u003ca href=\"\/blogs\/guides\/what-is-osha-29-cfr-1910-95-hearing-conservation\" style=\"color:#4fc3f7;\"\u003eOSHA 1910.95\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 style=\"color:#ff9800;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eAre these SAFEBUILDER ear muffs cap-mount or over-the-head?\u003c\/h3\u003e\n\u003cp\u003eThey are cap-mount muffs. The arms clip into the side accessory slots of a slotted hard hat — they are not designed to be worn over a bare head. If you need over-the-head muffs, browse the ear muffs collection.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eWhat is the actual NRR of these ear muffs?\u003c\/h3\u003e\n\u003cp\u003eThe verified rating is NRR 27 (ANSI S3.19). The listing markets a 30dB figure, but plan your protection around NRR 27, which is the tested value we cite.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eWill real-world protection match the NRR 27 label?\u003c\/h3\u003e\n\u003cp\u003eNo — lab NRR overstates field performance. OSHA and NIOSH advise derating; a common method subtracts 7 dB and halves the result, putting realistic at-ear protection in the low double digits. See how to calculate the NRR you need for the math.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eDo these fit my hard hat?\u003c\/h3\u003e\n\u003cp\u003eThey fit standard slotted hard hats with 30 mm accessory channels, which covers most common construction helmets. They will not attach to a hard hat without accessory slots, and they cannot be worn without a helmet.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eAre these electronic or passive?\u003c\/h3\u003e\n\u003cp\u003ePassive. There are no microphones, no sound amplification, and no AM\/FM or Bluetooth. They simply block noise. For amplified hearing of speech and commands, look at electronic ear muffs.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan I hear speech or warnings while wearing them?\u003c\/h3\u003e\n\u003cp\u003ePassive muffs reduce all sound equally, so speech is muffled along with noise. If your job requires hearing commands while protected, an electronic muff that amplifies low-level sound is the better tool.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eAre these good for shooting or the range?\u003c\/h3\u003e\n\u003cp\u003eThey will protect your hearing, but passive muffs do not let you hear range commands the way electronic ones do. Shooters who want situational awareness usually choose electronic ear muffs.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eDo these meet OSHA hearing-protection requirements?\u003c\/h3\u003e\n\u003cp\u003eOSHA 1910.95 requires hearing protection when noise exposure crosses the action level. NRR 27 muffs can be part of compliance, but you must derate the rating against your actual measured exposure. Review OSHA 1910.95 for the thresholds.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eCan I wear these with ear plugs for more protection?\u003c\/h3\u003e\n\u003cp\u003eYes. For the loudest tasks, combining these muffs with foam plugs (dual protection) adds attenuation beyond what either provides alone. NRRs do not simply add, so follow the dual-protection calculation in our NRR guide.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eDo they need batteries or charging?\u003c\/h3\u003e\n\u003cp\u003eNo. They are fully passive, so there is nothing to charge and nothing to fail mid-shift. That simplicity is a key reason crews choose passive cap-mount muffs.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eHow do these compare to over-the-head muffs?\u003c\/h3\u003e\n\u003cp\u003eCap-mount muffs keep head and hearing protection on one unit for helmet wearers, while over-the-head muffs suit bare-head work. For bare-head use, see the Moldex MX-6 over-the-head earmuffs or the full ear muffs collection.\u003c\/p\u003e\n\u003ch3 style=\"color:#ffb74d;\"\u003eAre these covered by a warranty, and how does shipping work?\u003c\/h3\u003e\n\u003cp\u003eThese ship and are fulfilled through Amazon, where current pricing, warranty details, and delivery estimates are shown at checkout. Use the Amazon button on this page to confirm availability before you buy.\u003c\/p\u003e\n\u003cdiv style=\"border-top:1px solid #444;margin-top:28px;padding-top:14px;font-size:0.9em;color:#cfd8dc;background:#1a2733;border-left:4px solid #4fc3f7;padding:14px 18px;\"\u003e\n\u003cp\u003eWritten by \u003cstrong style=\"color:#ffb74d;\"\u003eSteven Eaton\u003c\/strong\u003e, WC Safety Editorial. Specifications sourced from SAFEBUILDER published data. Compare the range in \u003ca href=\"\/collections\/hearing-protection\" style=\"color:#4fc3f7;\"\u003ehearing protection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eWC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Match the product to your specific hazard and follow your site PPE program.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SAFEBUILDER","offers":[{"title":"Default Title","offer_id":44142507229272,"sku":"DL-5007E","price":15.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/1900\/0920\/files\/safebuilder-30db-ear-muffs-hard-hats-type-safety-e.jpg?v=1782295797","url":"https:\/\/wcsafety.com\/products\/safebuilder-30db-ear-muffs-hard-hats-type-safety-earmuffs-for-safety-helmet-hear","provider":"WC Safety","version":"1.0","type":"link"}