Smartdoo Men's Compression Cool Dry BaseLayer Pants Wear Under Leggings Sports Tight Long Pant for Men(PRO Black with Green Stripe, S) Material:84% polyester + 16% spandex. Fabric features:Quick drying, breathable, ventilation, moisture-absorbing and perspiration, stretchable, elastic,soft, comfortable,smooth.UV Blocking :99% . It's coolness as well as being muscular and Skin-friendly.Designed for all seasons.Have excellent warm functions in winter and have excellent cool functions in summer. Use:Perfect for running, basketballhiking, cycling, gym programs and other kinds of indoor & outdoor activities. Find your size on the chart. We're confident you'll love this pants/shirt! If you aren't happy with this product for any reason, we'll give you a full refund!