Craft's main objective when designing the Craft Active Extreme Concept Piece long sleeve crew was to create a base layer that keeps you dry 100% of the time, across a broad range of activities. Active Extreme allows athletes to perform optimally in cool and cold conditions. This revolutionary baselayer is made of thin, lightweight and elastic micro polyester that is channel-stitched with a combination of two high-tech fibers. Six-channeled fibers against the skin accelerate moisture transport, cooling the body down, while hollow fibers on the outside offer insulation as well as moisture transport to the next layer. Active Extreme is odor resistant and keeps the body fresh during intense workouts. The body mapped fabrics are extremely elastic for a perfect fit and optimal freedom of movement, and feature smooth flatlock stitches for optimal comfort.