Men's, and women's mid layer Our warmest temperature control layer. This single sided lightweight low bulk stretch micro fleece is ideal for layering. Specially engineered micro polyester and spandex yarns add warmth and insulation when you need it without causing overheating. 4-way stretch provides for complete freedom of movement. Anti-pill process ensures long lasting durability while the ec2 Qwik-dri process transports moisture to the outside surface where it quickly evaporates to keep you warm and comfortable in extreme cold temperatures. Antimicrobial process help eliminate odor causing bacteria.