The redesigned Tek Sok delivers exceptional cooling & comfort in hot weather conditions. Coolcore s™ patented chemical-free cooling, moisture-wicking, moisture transportation & evaporation fabrics used in this neck gaiter are exactly what you need to keep cool & maximize performance. Unlike other cooling & sweat-wicking fabrics that rely on chemicals or polymer crystal treatments that degrade over time, the Tek Sok will deliver consistent cooling & wicking performance throughout the lifetime of the garment. Features Coolcore™ patented chemical-free cooling fabric Four-way stretch Non-abrasive flat-lock stitching for comfort Stretch seams to avoid seam popping Breathable, moisture-wicking fabric Fast-drying One size fits all