The outer and inner (next to the skin) layers are dry. The inside chamber is where all the cooling occurs. Fill the leak-free cap with a half-liter of water and you’ll remain cool well into the next day without soaking your workday clothes.
Provides immediate, long-lasting cooling
Up to 3 days of cooling ability
Activate with 13 oz. to 20 oz. (400ml to 600ml) water
Lightweight, durable and machine washable
Easy to use watertight filling cap