The FlexiFreeze Cooling Collar is a re-freezable neck wrap designed to keep you cool and comfortable in hot environments. Nothing beats pure water for cooling power. Water (when frozen) absorbs 35% more heat as it thaws than chemical gels. The FlexiFreeze Cooling Collar contains two 8-cube strips of FlexiFreeze Ice to provide long lasting cooling. With its soft inner lining, this cooling collar is very comfortable. It's the perfect accessory to wear during a ride or after to help cool off. Simply freeze and use. Each strip of FlexiFreeze cools for about 35 – 45 mins. Reuse over and over again.