85% Polyester, 15% Elastan Thermal Swim Shirt: Keep warm while you swim with this swim shirt for men, women, and kids; made with BiPoly fabric to trap body heat, this shirt is perfect for cold pools and open water swims Flexible Swim Shirt: With a comfortable fit and flexible design, this swim shirt for men, women, and children won't restrict your range of motion High-Quality Swim Gear: The strong yet lightweight material of this children's, men's, and women's swim shirt conforms to your body and offers UVA and UVB protection Swim Training Equipment: Used over time, the slight drag effect of the Thermal Swim Shirt will also build endurance and strength About FINIS: Our mission is to simplify swimming through innovation, high-quality products, and a commitment to education