●Material: 90% Nylon 10% Elastane. Machine washable. Dont bleach. ●Seamless fabric: soft, four-way compression, elastic, low friction, quick-drying, lightweight fabric with excellent moisture wicking and breathability to keep you cool and dry during your run or training. ●Comfortable and skin friendly: Flat lock seams combined with soft fabrics reduce chafing and improve comfort and skin friendliness. ●Feature: Thumbhole shirts can keep the sleeves from shifting or flapping in the wind, help Keep Your Sleeves In Place and Hands Warm, add a little more coverage in cool weather, Provide a awesome vision ●Notice: Please check the size information in the description below before ordering instead of the default amazon size chart.