Specifications: [What is WonderKool?] Wonderkool is an attractive fabric tubular scarf-like product which contains X-crystals. During the summer when you are feeling exhausted or sluggish due to the heat, the X-crystals, when soaked in water, significantly expand in volume to provide you with a cooling sensation for two to three days. Not only does it lower the body temperature, but it also doubles as a fashion accessory. [Uses] Wonderkool is perfect for jogging, hiking, fishing, golf, tennis, spectator events driving, studying, using the computer, and other activities. It is also suitable for lowering the body temperature during a fever. Wonderkool is an alternative for those who dislike using air conditioners