Womens Instant Cooling Tank L - Polar Blue. Arctic Coolâ??s revolutionary Instant Cooling Tank is a must for athletes, workout warriors and anyone who wants to keep cool and comfortable. It boasts state-of-the-art HydroFreeze X Technology, a moisture-management system that provides just the right amount of cool to keep you comfortableâ?¦not chilled. Itâ??s made with fabric that is fast-drying, cool and soft to the touch. Designed to provide a full range of motion with 4-way stretch. Its ultra-lightweight construction is anti-microbial and easy to clean. Arctic Cool makes it easy to stay cool and comfortable while you stay active.