Women's Performance Strap Back Vest this is a sporty vest suitable for the gym, yoga or pilates. Made from 100% polyester incorporating sweat wicking this vest keeps you cool and sweat free. It has a racer back design making it comfortable to wear and gives you ease of movement. This is a fitted style vest FabricXS 30" S 34" M 38" L 42" XL 46" XS 8 S 10 M 12 L 14 XL 16100% Polyester