Underworks Mens Cotton Spandex Compression Crew Neck T-shirt, Small, Black CottonSpandex Made in USA Sizes: Measure Chest in Inches: Small 32-35 / Medium 36-39 / Large 40-44 / X-large 45-48 / 2X 49-52 / 3X 53-84 Made of cotton, feels like cotton, looks like cotton - No shiny look Powerful compression yet breathable and undetectable Helps in muscle recovery after sporting events - Improves circulation and provides back support Base layer or as athletic gear or as a top - Quality construction - Made in the USA