Our Northern Lights Balaclava is made out of BLCOOL is a unique system to keep you cool and dry despite how hot you get. BLCOOL has 2 layers, the inside layer is a soft loose knit polyester fiber to absorb the sweat and to aid air flow over the skin. The outside layer has vertical slits to act as a siphon for the sweat allowing it to evaporate quickly with the heat of the body. This causes airflow into the fabric so cooling the skin.
In short, BLCOOL acts the same as your skin does; it uses your own sweat to cool you down!