Inspired by popular Rapid Assault Combat Shirt, the Rapid Quarter-zip is built from a high performance, quick-dry, two-way stretch polyester/spandex fabric that provides a snug and secure fit without bunching or rolling. An ideal bottom or mid layer, the Rapid features a moisture wicking finish that keeps you warm and dry, a secure zip pocket on the left arm, an embossed loop platform on the right arm, and stylish embroidered 5.11 branding. Material: Polyester, Spandex.