For all sports and cold-weather activities, the TSLA Thermal Baselayer Series is designed with the best heat insulation and thermal materials. ** Washing Tip : Wash separately before wearing. Lay flat to dry and do not dry clean. [Fleece Lining] The purpose of the micro-fleece lining is to give warmth as well as moisture sensing, quick drying, and two-way air circulation. [Non-Abrasion Fabric] With moisture detecting, quick-dry, two-way air circulation, and great durability. [Flatlock Seams] Smooth seams that promote excellent comfort and protection. It is appropriate for both indoor and outdoor activities including basketball, boxing, fitness, hiking, cycling, and other outdoor and indoor sports.