HVN-400U - Class 2 Cooling Vest
The default for general construction. Ships complete with fans, battery, and cable.
Cooling gear for construction crews
Hi-vis, harness-compatible, and cool enough that the afternoon doesn't cost you the schedule.
Construction heat isn't the forecast. It's the site.
Concrete and steel soak up sun all morning and radiate it back through the afternoon. There's no shade until the structure goes up, and by then the crew has moved to the next floor. Work starts at six to beat the heat, so the hardest hours land when the body is already depleted.
And the crew is layered before the heat even starts — hi-vis over a work shirt, a harness over that, long sleeves, hard hat. Every layer is one more barrier between sweat and moving air. Sweat that can't evaporate costs the worker water and returns nothing.
The result: a crew that's soaked and overheating at once, and a back half of the shift that produces less than the front.
What's specified on a construction site
High-visibility. Most general construction and work zones specify ANSI/ISEA 107 Class 2. Work near moving traffic or in a highway right-of-way typically requires Class 3. The site safety plan names the requirement.
Fall protection. A rear opening lets the dorsal D-ring pass through to the outside, so a lanyard or SRL attaches normally. Don the harness per the manufacturer's instructions and verify D-ring access before working at height. The garment is not part of the fall-arrest system.
Head protection. The HVC-03U attaches to a full-brim hard hat. It's an accessory, not head protection, and doesn't replace a hard hat meeting ANSI/ISEA Z89.1. Confirm your hard hat manufacturer permits brim-mounted accessories.
THE CASE FOR IT
Why fan-cooled works on a construction site
01
No freezer on the job
Ice vests need a cooler and someone to keep it stocked. A battery charges overnight in the truck.
02
It lasts the shift
Phase-change packs go warm in a few hours — right when the afternoon peaks. One battery covers the day.
03
The hi-vis is built in
No second layer over the cooling layer. One garment does both jobs at once.
04
It works over a harness
Nothing gets removed, re-rigged, or unclipped to stay cool during the shift.
05
It stays dry all day
Soak-vests mean wet fabric against skin and under a harness for hours.
Where it doesn't belong
ZIPPKOOL isn't right for every job
Not flame-resistant.
For welding, cutting, hot work, or anywhere FR clothing is required, use FR-rated gear and a non-powered cooling option.
Not intrinsically safe.
Not rated for explosive atmospheres — flammable gases, vapors, or combustible dust.
Fans off near rotating machinery.
Running fans inflate the garment. Near shafts, conveyors, augers, or power take-offs, switch them off and keep the garment zipped.
Not a replacement for the basics.
Cooling garments supplement — they don't replace — hydration, rest, shade, and acclimatization.
FAQ
Questions we get from safety managers
The specification and compatibility questions that come up most.
Can the crew wear it over a harness?
Yes. The dorsal D-ring passes through a rear opening to the outside. Verify access before any work at height.
Class 2 or Class 3?
Class 2 for most general construction and work zones. Class 3 near moving traffic or in a highway right-of-way. The site safety plan names the requirement.
Is the battery approved for site use?
LI-PRO1U is ETL Certified by Intertek, an OSHA-recognized NRTL. Both packs are UN 38.3 certified for transport and FCC compliant. Full documentation is downloadable — no form.
Talk to us about your crew
Volume pricing, PO and net terms, and complete compliance documentation for your approval process.