The AlphaCool Tundra Phase Change Cooling Vest is designed keep you cool in a hot environment. The vest features a unique cooling gel that was developed to stay at 64F for up to 4 hours, reducing the physical discomfort & dehydration risks. Unlike other vests, the AlphaCool Tundra Phase Change Vest maintains the same temperature for hours, does not condensate, and will make you feel up to 10F cooler. The unique design of this ice vest allows you to simply slip it on and instantly cool your core temperature to reduce the dangerous effects of heat stress. Tundra Phase Change Vest Features: Instant Cooling Comfort Lightweight 3lb Design Cooling lasts 3-4 hours Store in packs in the refrigerator or freezer for instant use Reusable over and over! Water-based non-hazardous ingredients Adjustable straps for fit The vest, without the inserts, is machine washable Fits Sizes XS-3XL Features: Instant Cooling Technology: The AlphaCool Tundra Vest employs advanced phase change materials that absorb and release heat to regulate your body temperature effectively. Experience prolonged cooling without the need for external power or refrigeration. Adjustable Design: With its adjustable straps and lightweight construction, this summer vest offers a customizable fit for maximum comfort. It won&';t weigh you down, allowing freedom of movement during physical activities or work. Lasting Cooling Performance: The phase change materials in the vest offer advanced absorption for extended cooling relief, ensuring you stay comfortable for hours on end. Simply recharge the adjustable vest top by exposing it to a cool environment for repeated use. Breathable Fabric: This summer clothing features a breathable fabric that enhances airflow, keeping you cool and dry. It&';s built to last, with high-quality materials that withstand regular use in various environments. Versatile Uses: This ice vest is suitable for a wide range of applications. Whether you&';re a construction worker, athlete, gardener, or simply want to beat the heat, the AlphaCool Tundra Vest is an ideal solution for anyone seeking instant cooling relief. AlphaCool Tundra Phase Change Vest Instructions: Remove the PCM inserts from the vest & place them in the freezer for 1-3 hours, or until frozen solid. Place inserts into the vest pockets Use the velcro straps to adjust fit.