The slim-fit Men's Summit Series FUTUREFLEECE™ Crew incorporates cutting-edge technology that employs a full-loop fabric to reduce weight and enhance temperature regulation. It's specifically designed to be worn as a layer over your base layer and beneath the insulation required for your mission. Additionally, flat-locked stitching and the absence of shoulder seams ensure your comfort remains uncompromised even when wearing a backpack. FUTUREFLEECE™ offers an excellent warmth-to-weight ratio and soft hand feel Clean-finish collar with partial flat-sewn elastic No shoulder seams for reduced bulk and extra comfort while you’re wearing a pack Underarm gussets for mobility Flat-locked stitching in key zones for next-to-skin comfort Flat-sewn elastic cuffs with integrated thumb loops Clean front hem with flat-sewn elastic on back Raglan sleeves and underarm gussets for mobility Fit: Slim Fabric: 55% polyester, 45% recycled polyester