About our cooling technology

Glacier Tek Cool Vests are designed to help keep your body cool and comfortable even in the harshest of environments. How is this achieved? Through innovation.

biopreferreddecalweb.pngWhile other cooling vests rely on less-than-ideal methods to cool you down, Glacier Tek takes a different approach. Each Glacier Tek vest includes a set of GlacierPacks, cooling packs that are powered by PureTemp, a biobased phase change material that carries the USDA Certified BioPreferred® label. The GlacierPacks maintain a cool – but not cold – temperature of 59° F for up to 2½ hours. They are free from hazardous ingredients or materials, making our cooling vests the only ones on the market that are completely safe for the wearer as well as the environment. What's more: In laboratory testing, the cooling material has shown consistent, repeatable performance over thousands of melting-solidification cycles. It never stops working.

Are you new to the world of cooling vests? Here's how Glacier Tek vests keep you comfortable:


Cooling technologies offered by competitors fall short in a variety of ways:

Paraffin-based PCMs

• Some PCM products use old-style petroleum byproducts, like hexadecane, which are hazardous chemicals.

• Petroleum-based PCMs are not completely biodegradable and may take years or decades to decompose, leading to long-term effects on the environment.

• Some paraffins, and other petroleum-based products, are carcinogenic and may be toxic to plants and wildlife.

• Paraffins can contribute to an increase in carbon emissions.

• Paraffins must be handled and disposed of according to hazardous material regulations in all 50 states and in most foreign countries.

Ice and gel

• Ice and gel pack PCMs are bulky, have a shorter cooling time and have the strong potential to sweat.

• A fully loaded vest with packs typically weighs between 9 and 11 pounds. Glacier Tek vests weight about half that.

• Since ice packs solidify at 32°F / 0°C, they can cause tissue damage with prolonged exposure to skin.

• Stays cool for only a short time.

• Will melt and produce condensation, leaving the wearer uncomfortably wet.


• Evaporative technology relies on soaking the vest in water before putting it on, which can make the wearer uncomfortable after time.

• Will only work in warm, dry air.

• Will not work in high humidity climates, which is severely limiting.

• Can cause skin irritation, bacterial growth, mold and foul odor

• Will not work under any protective outerwear.