UPGRADE ADVANCED COOLING COLD SENSE VEST: These cold vests use the newest generation of second-generation evaporative PVA material, Super absorbent and evaporative making your body cooler. Physical automatic cooling, just re-soak about 3 minutes to increase cooling duration It will provide you with a comfortable cooling effect for 3-6 hours, instant cooling can cool down body temperature by 18F. LIGHTWEIGHT BUT DURABLE AND REUSABLE: Cooling PVA fabric keeps you cool as the water evaporates, reusable and durable Believe me, this is the lightest evaporative cooling vest you've to try. Washing your vest can be done by hand with a mild detergent. Do not tumble dry the vest. Hang to dry in an open area. Ideal for those needing cooling relief NO REFRIGERATION REQUIRED, NO ELECTRIC OR ICE PACK: Cooling the body only with the evaporation of water, not only economically realizing "power saving and preventing heat stroke", but also doesn't hinder the body when your construction work, cycling, running It is more useful than any other ice vest Great value if bought this cooling vest for your family or friend as a gift. CARDIGAN VEST DESIGN: Advanced evaporative techniche cooling vest, cardigan in the front fit different body sizes, anyone under 250 pounds can use , unisex cooling vests for women man, perfect for peoples or who work in hot summer Must have if you work or travel in hot weather IDEAL FOR ALL OCCASIONS: This evaporative cooling vest is great to relieve summer heat, heatstroke prevention, such as construction, high-temperature operation outside, outdoor, amusement park walking foll performers, truck drivers, courier, running, cycling, climbing, cooking, etc. Note: The cooling time depends on the temperature of the environment and the personal body temperature, we suggest you can soak the vest in the ice water if you can, this will make you cooler. PLEASE NOTE: in order to safe delivery, the cooling vest you received is wet, cooling, and soft, all our item are brand new, don't worry, when the water evaporates, it is normal if the vest become hard, you can soak in water and cooling again, it will become soft, thanks for your kindly understanding