WOASAWE Men's Thermal Fleece Base Layer Sports Fitness Workout Shirt Pants Winter gear : Thermal fleece lined shirts & pants are designed for Warmth 100% Polyester, Excellent elasticity with enhanced range of motion Four needle six lines technology, Flat seam construction helps prevent skin irritation Perfect Option for Body Building, Gym, Running, Cycling etc. Suitable for all sports indoors and outdoors. Find your size on the chart below. If you prefer a looser fit, go up a size.