Underworks Cotton Compression Crew Neck Long Sleeves 3-Pack CottonSpandex Sizes: Measure Chest in Inches: Small 32-35 / Medium 36-39 / Large 40-44 / X-large 45-48 / 2X 49-52 / 3X 53-121 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 The feel of cotton and the stretch and fit of spandex are merged together to stretch and conform to every curve of your body and move with you and fit you like second skin providing you unmatched comfort, fit, and durability. The most comfortable all day underwear. Made in U.S.A. 3-Pack Fitness enthusiasts use them to complete their workout outfit They serve as a base layer underneath a shell or jacket for your outdoor colder-weather activities Made in USA <span class="a-text-bold">MEASURE YOUR CHEST:</span> With arms down on side, take a snug measurement around the fullest part of your chest over the nipples. <span class="a-text-bold">HOW TO WEAR:</span> Pull garment over head and adjust for comfort. <span class="a-text-bold">HOW TO CARE:</span> Wash in cold water, gentle cycle, tumble dry low or flat dry. No bleach, no iron.