This vest top is crafted from a moisture-wicking Sensitive® fabric with Lycra Sport® stretch that gives you full range of motion and guaranteed comfort. A UV treatment repels the sun's rays for an added layer of protection on long summer days. The double-layered fabric on the upper part provides extra support. Plus, the fabric breathability will keep you feeling fresh and focused as you work up a sweat. Designed to be worn on its own or layered under a jacket, the Wonder Canotta Vest Top for women is a functional and stylish base layer for running, trekking, or exploring the outdoors.