KLIM&';s Aggressor Cool -1.0 Base Layers provide a level of cooling and comfort never before seen in the power sports industry. Coolcore&';s(TM) patented chemical-free cooling, moisture-wicking, moisture transportation and cool evaporation fabrics used in these base layer are exactly what you need to keep cool and maximize performance. Unlike other cooling and sweat-wicking fabrics that rely on chemicals or polymer crystal treatments that degrade over time, Klim&';s Aggressor Cool fabrics will deliver consistent cooling and wicking performance throughout the lifetime of the garment. When high performance athletes demand high performance cooling and comfort, they go to KLIM&';s Aggressor Cool -1.0 base layers.