Ergodyne Chill-Its 6670CT Hard Hat Sun Shade Review

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Reviewed by Steven Eaton, WC Safety Editorial

The Ergodyne Chill-Its 6670CT is a hard hat cooling accessory from Ergodyne, listed at the listed price — built as clip-on evaporative neck shade in hi-vis lime. It's the pick for road, rail, roofing, and utility crews working under direct sun in hard hats. This review covers what the listing documents, where it beats its closest rival, and who should buy something else.

Why the Ergodyne Chill-Its 6670CT Stands Out

Published July 9, 2026 · Last updated July 27, 2026

Road crews and roofers burn the back of the neck first — it's the body part the hard hat shades least and the sun hits longest. The 6670CT clips to the hat brim and drops an evaporative PVA shade over exactly that zone: sun blocking plus active cooling in one attachment, in hi-vis lime that doesn't undercut the visibility program. Soak it at the cooler like a towel.

Specification and Configuration

What the listing commits to: evaporative cooling hard hat neck shade; hi-vis lime; clips to hard hat. Claims beyond that — lab numbers, endurance figures, certifications the listing doesn't state — don't appear in this review, because we don't invent them. Size and color options run on the linked Amazon listing rather than as separate stocked variants.

Cooling gear splits by method and body zone: evaporative gear is cheap and rechargeable at any water source but fades in humidity; phase-change holds a fixed temperature anywhere; wicking gear manages sweat rather than actively cooling. The Ergodyne Chill-Its 6670CT is the hard hat cooling accessory entry in that matrix — the full lineup is in our Cooling Gear collection.

Where It Falls Short

Its limits, honestly: Hot-work environments — sparks and standard PVA don't mix; the 6717FR is the FR version of this exact product.

Pros and Cons

Who Should Buy It

Consider the Ergodyne Chill-Its 6670CT if you are road, rail, roofing, and utility crews working under direct sun in hard hats.

Who Should Skip It

Skip it for hot-work environments — sparks and standard PVA don't mix; the 6717FR is the FR version of this exact product.

How It Compares

Same product, two environments: 6670CT for general outdoor work at the 6717FR in FR construction for welding and hot work at the listed price. The only question is whether sparks exist where you work. The Cooling Gear collection carries the complete ladder so you can compare every tier. Head-to-head rival: Ergodyne Chill-Its 6717FR.

Other Options in the Lineup

• Ergodyne Chill-Its 6612
• Ergodyne Chill-Its 6717FR
• Ergodyne Chill-Its 6715CT
• Ergodyne Chill-Its 6614
• Ergodyne Chill-Its 6602
• Ergodyne Chill-Its 6602MF
• Ergodyne Chill-Its 6606FR
• Ergodyne Chill-Its 6603
• Ergodyne Chill-Its 6700CT

Jobsite PPE Guides

• Best Cooling Gear Buyer's Guide
• Construction Site PPE Guide
• Best Hard Hats for Construction
• Best Hi-Vis Shirts (hot-weather layer)
• Hi-Vis Safety Apparel Complete Guide
• Best Safety Glasses for Construction Workers

Browse by Category

• Cooling Gear Collection
• Hard Hats
• Head Protection
• Hi-Vis Shirts
• Safety Vests
• Welding Gloves (FR crossover)

Frequently Asked Questions

The Bottom Line

The Ergodyne Chill-Its 6670CT does its job at its price: clip-on evaporative neck shade in hi-vis lime at the listed price. Rated 4.5/5 on documented spec, configuration, and value for the intended buyer.

Common questions

How much does the Ergodyne Chill-Its 6670CT cost?

current pricing at the linked Amazon listing. Prices track the live listing, and size or color selections there can shift the number.

Ergodyne Chill-Its 6670CT vs Ergodyne Chill-Its 6717FR — which should I buy?

Same product, two environments: 6670CT for general outdoor work at the 6717FR in FR construction for welding and hot work at the listed price. The only question is whether sparks exist where you work.

Who is the Ergodyne Chill-Its 6670CT best for?

Road, rail, roofing, and utility crews working under direct sun in hard hats.

When should I skip the Ergodyne Chill-Its 6670CT?

Hot-work environments — sparks and standard PVA don't mix; the 6717FR is the FR version of this exact product.

What sizes does the Ergodyne Chill-Its 6670CT come in?

The size run (and color options where offered) lives on the linked Amazon listing — we deliberately don't restate it, because listings update. Check the size chart there before ordering.

Is Ergodyne a good brand?

Ergodyne invented the jobsite cooling category with the Chill-Its line and remains its reference brand — it is also one of the most-stocked vendors we review across hi-vis apparel and gloves. Chill-Its model numbers are stable, listings state their cooling method plainly, and the line covers every price tier, from budget bandanas to phase-change systems.

How long does the Ergodyne Chill-Its 6670CT stay cool?

Evaporative gear runs hours per soak, with duration set by heat, airflow, and humidity — then a re-soak restarts it. The operating model is rotation: water source nearby, spare in the cooler.

Does the Ergodyne Chill-Its 6670CT work in high humidity?

Evaporative cooling slows as humidity rises — the same physics that makes sweating feel useless in the swamp. It still helps, but consistently humid climates should look at the phase-change 6260 for the serious intervention.

Is the Ergodyne Chill-Its 6670CT safe around welding or sparks?

No — standard cooling textiles have no flame resistance and don't belong inside a welding jacket or near sparks. Ergodyne makes FR versions (the 6606FR towel and 6717FR neck shade) for exactly that boundary.

How do I clean and store the Ergodyne Chill-Its 6670CT?

Rinse after use, wring, and let it dry fully before storage — PVA stored wet in a sealed container grows mildew. Most Chill-Its pieces machine-wash; follow the care line on the listing.

Does OSHA require cooling gear like the Ergodyne Chill-Its 6670CT?

Federal OSHA enforces heat hazards under the General Duty Clause and a heat National Emphasis Program, with a heat-specific standard in rulemaking; several states (California, Washington, Oregon) have their own heat rules. Water, rest, and shade are the program core — cooling gear is the equipment layer employers add on top, and it should appear in the written heat-illness prevention plan.

Can I wear the Ergodyne Chill-Its 6670CT with hi-vis or other PPE?

Hard-hat cooling accessories are designed around the hat — inserts and pads go inside the suspension, shades clip to the brim. Check ratchet fit after installing anything inside a shell.

What's the cheapest effective heat-stress setup for a small crew?

Water, shade, and scheduled rest cost nothing and come first. The first equipment dollars go to a cooling towel or bandana per worker (the cheapest line item), then hard-hat inserts for full-shift hat wearers, then vests for the sustained-heat roles. The whole ladder costs less than one heat-illness incident report.

Is the Ergodyne Chill-Its 6670CT reusable season after season?

Yes, with dry storage between uses. Evaporative PVA and wicking textiles last seasons if rinsed and dried; phase-change packs recharge indefinitely. Retire pieces that stay stiff, smell musty, or no longer hold water.

Does the rating on the box equal the protection I get?

No. Published ratings come from laboratory conditions. Regulators apply derating precisely because real fit is worse, and the derated figure is the one to plan from.

Sources. Requirements referenced here come from OSHA 29 CFR 1910 and the NIOSH recommendations. Where a consensus standard governs, the ANSI document is named in the text.

Related reference

Closely related on this site: best cooling gear, wbgt vs heat index: which should you use for workplace heat stress?, and how to work safely in extreme heat.

Why trust WC Safety

WC Safety is an independent, affiliate-supported review site. It is not a retailer: it holds no inventory, takes no orders, and earns only from qualifying purchases through clearly marked links — which never changes what a product is rated to do. Standards language is taken from the regulation text directly, and ratings are reported as the manufacturer publishes them. We run no laboratory and perform no testing of our own. Where published sources disagree, we say so and plan on the conservative figure rather than the flattering one.

Our methodology

Figures come from the regulation and the published specification, in that order. Derated numbers are calculated, not estimated. Nothing here is presented as a measured result, because we measure nothing.

Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers and regulators publish, with the gaps in that record marked. Last reviewed August 2026.