The Men's Zonal III Long Sleeve Base Layer Top from Dare 2b is packed with comfort & performance for year-round use. It uses ergonomic body mapping with seamless construction & a hint of elastane for total comfort in wear. The Body fabric helps to regulate your core temperature by keeping you cool when your sweating & warm when your cold. It rapidly transfers moisture away from the skin, dries quickly when wet & has an anti-bacterial finish for lasting freshness.