How long does a cooling vest last on a shift?
Runtime depends on technology. Ice pack vests last about 60 minutes before melting. Phase change (PCM) vests hold a constant temperature for 1.5–2 hours. Evaporative vests give 0.5–3 hours depending on humidity. Fan (air-cooled) vests run 6–8 hours on a battery but only cool in dry air below about 95°F. Circulatory vests run 2–4 hours. Active solid-state vests like Clema run 4–6 hours per battery, or 8–12 hours with one hot-swap in under a minute.
Which cooling vest lasts the longest?
By battery runtime, active solid-state vests last longest. 4–6 hours per battery and 8–12 hours with a hot-swap, followed by fan vests at 6–8 hours. Among passive vests, circulatory (2–4 hours) outlasts PCM (1.5–2 hours) and ice (about 60 minutes). But runtime only matters if the vest still cools in your conditions: fan and evaporative vests stop working in humidity or above roughly 95°F.
How much does a cooling vest cost?
Rough ranges: evaporative $20 to $60, ice pack $30 to $100, fan $50 to $200, PCM $100 to $300, circulatory $300 to $1,000+. The cheap end carries hidden costs: daily ice, re-soaking, and packs that wear out every 12 to 18 months. Clema shares early-access pricing with accepted applications.
What is the difference between a PCM cooling vest and an evaporative cooling vest?
A PCM (phase change material) vest uses packs that melt at a fixed temperature (58–65°F) and hold that temperature for 1.5–2 hours. An evaporative vest is soaked in water and cools by evaporation for 0.5–3 hours, working well in dry climates and poorly in humid ones. PCM works in humidity; evaporative is cheaper and lighter.
Do fan cooling vests work in humidity?
No. Fan (air-cooled) vests use small battery fans to blow air across the body and speed up sweat evaporation, so they only cool when the air is dry and below about 95°F. In humidity or extreme heat they stop cooling. They are also bulky outer layers and cannot be worn under PPE such as hi-vis or FR gear.
Which cooling vest works best in high humidity?
Evaporative and fan vests fail in high humidity because sweat and water cannot evaporate efficiently. PCM, circulatory, and active solid-state cooling vests all continue to function in humid environments. For Gulf Coast refineries, summer warehouses without HVAC, and similar high-humidity settings, choose PCM, circulatory, or active cooling.
What is an active or solid-state cooling vest?
An active, battery-powered cooling vest uses thermoelectric (Peltier) modules to move heat away from the body. There are no moving parts, no ice, no water, and no humidity dependency, so performance is consistent across climates. Clema is a battery-powered active cooling vest that runs 4–6 hours per battery, or 8–12 hours with one battery swap, with a >25°F felt temperature drop, and is worn under PPE.
Can workers wear a cooling vest under hi-vis or FR coveralls?
It depends on the vest. Fan and circulatory vests are bulky outer layers that cannot fit under PPE. Bulky PCM vests can also interfere with outer gear. Slim sub-3-lb active systems like Clema add far less bulk than an outer-layer vest, and work with a fall-arrest harness.
How do I compare cooling vests over their full lifespan?
Look at how a vest resets, not just its runtime. Ice packs need daily freezing and replacement every 12–18 months. Circulatory vests need less frequent upkeep and last 3–4 years. Active vests with hot-swap batteries need no ice, water, or packs at all across a multi-year lifespan.
What are the different types of cooling vests?
There are six main types: ice pack, phase change material (PCM), evaporative, fan (air-cooled), circulatory, and active solid-state. They differ mainly in where the cooling comes from, which determines how long each one lasts, whether it works in humidity, and whether it fits under PPE.
What is the best cooling vest for industrial workers?
For full industrial shifts, the best cooling vest is one that survives humidity, fits under PPE, and lasts 8+ hours without re-icing. Active solid-state vests like Clema run 4–6 hours per battery (8–12 with a hot-swap), work in any humidity, and weigh under 3 lbs.
What is the best cooling vest for construction workers?
Construction crews need a vest that fits under a harness and hi-vis without restricting movement on a ladder or scaffold. Bulky fan and circulatory vests are outer layers that don't work with a fall-arrest harness. A slim, sub-3-lb active cooling vest like Clema is built to work with a fall-arrest harness.
Are cooling vests unisex or do they come in men's sizing?
Most cooling vests are built as adjustable, close-fitting layers meant to sit under existing PPE rather than as fashion-fit garments, so fit comes down to adjustable straps and low bulk rather than a men's-specific cut. What matters most for fit is whether the vest is slim enough to layer under a harness or hi-vis vest without restricting reach or bending.
What is the best rated cooling vest?
There's no single vest that's best for every job, the top-rated option depends on climate, shift length, and whether it needs to fit under PPE. For dry, short tasks, evaporative vests are a simple, effective choice. For full shifts in any humidity under PPE, active solid-state cooling vests like Clema rate highest on runtime and fit.
How does an active cooling vest compare to an ice vest?
An ice vest cools intensely for about 60 minutes before the packs melt and need a freezer to reset. An active cooling vest like Clema generates cooling electrically for 4–6 hours per battery, swaps to a fresh battery in under a minute, and doesn't need ice or a freezer on site.
