Chill river tank is a fun sleeveless top with back venting and our super-cooling, wicking fabric for hot, long days. Features comfort stretch, Omni-Wick technology, and binding at the collar and armhole. Made with Omni-Freeze, it helps you feel cool and dry with accelerated wicking and next-to-skin comfort in moderate to hot conditions. The active fit ensures a full range of motion, with a back length of 28 inches. Shell: 89% polyester, 11% elastane. Keep your chill when temperatures rise in this sleeveless top with cooling technology and sweat-wicking fabric to help draw moisture away from your skin and keep you feeling cool and fresh all day. The comfort stretch fit and soft collar and armhole binding move with you for a flexible fit.