PoweCore FlexTekPolyester and recycled polyester fibers are combined in this mechanical stretch, paper weight base layer. Wicking and quick dry properties offer temperature regulation while fighting odor. Lightweight, moisture wicking material helps regulate body temperature in all conditions. Soft, supple PowerCore FlexTek fabric wicks moisture away from the body to keep you dry and comfortable. Ergonomic fitted body and elastic fabric provide flexible support for the perfect fit. Long body with clean finished hem edges sit flat against the body for comfortable layering.Comfort neck binding and smooth, flat lock seaming resists chaffing.