Klim's Aggressor -1.0 Long Sleeve is intended for use in HOT temperatures, and cools you down. It provides a level of cooling and comfort never seen before in the powersports industry. KLIMs second gen of Aggressor Cooling base layers use chemical-free fabric technology for cooling, moisture-wicking and evaporation, making this material unlike other cooling and sweat-wicking fabrics on the market. These fabrics will deliver consistent cooling and wicking performance throughout the lifetime of the garment. When high performance cooling and comfort are crucial on a ride, choose the KLIM Aggressor -1.0 Long Sleeve.