The name says it all with this popular piece of headgear. More than just another beanie, the Tech Mesh incorporates a poly and spandex blend for a snug and comfortable fit. We then lined the beanie with a Poly/Carbon fabric that incorporates a heat regulating technology woven directly into the yarn. The carbon fibers store unused body heat and release when needed. The result is a beanie that keeps you warm but not overheated no matter the outside temperature or your activity.