Tesla Gear Mens Compression Base Layer Shirt White M - US Small 92-percent-polyester-8-percent-spandex Tag M = US Small: Chest 34 - 37 inch, Length 25 - 26 inch Tesla is one of the best quality and value sports compression Baselayer and sportswear brands on the market. Suitable for all sports indoors and outdoors. Please see product description for full product benefits. Garment Care : Machine Washable Tight fitting - like a second skin. Use the size chart to select your size. If you prefer a looser fit, go up a size.