This 100% Peruvian Pima Cotton thermal fits like a glove and feels incredible. It can take you through the whole day. Black Top Thermal = Perfection. Black with minimal red accent stitchingItalian made carbon fiber patch near bottom hemRibbed cuffsSoft waffle fabricVersatile for layering or as is100% Peruvian Cotton - the softest and most durablePre-shrunkMachine washableFit Our Thermals are made of 100% Peruvian Pima cotton, the softest and most durable cotton in the world. The fabric has been pre-washed, so minimal shrinkage should occur. They are designed to have a soft, comfortable feel and a just right fit. Unlike our Sport Shirts, the sizing is standard, to slightly large. For instance, if you typically wear a large Thermal, choose a large. If you are typically in between a medium and a large choose a medium.