Thermal Underwear Kids Mock Turtleneck Shirts Compression Tops Base Layer NLK Thermal effect / temperature preserved /moisture management with Aerogear & Aerowarm Napping fabric Air bound in the aerowarm fabric by Double Layer fabric improves thermal effect for weather season It makes a nice and pleasant condition for exercises due to its super light spandex which is soft, wearable, flexible Spandex with high-elasticity allows the sweat to be quickly absorbed and dried Perfect fit to the body - high quality product Made in Korea (Korea fabric not in China)