Underworks Mens Firm Classic Compression Body Shirt 3-Pack NylonSpandex Sizes: Measure Chest in Inches: X-small 29-33 / Small 34-38 / Medium 39-43 / Large 44-48 / X-large 49-53 / 2X 54-58 / 3X 59-63 / 4X 64-85 Invisible under clothing, eliminates upper body bulges Extra panel in the mid-section and sides provide firm compression Provides back support and improves circulation Quality USA construction Made from a comfortable nylon knit and Lycra spandex that conforms to your body and moves with you, this invisible undershirt eliminates bulges throughout your upper body. It gives you the straight lines you want and provides your back with support from just under your neck to your lower back. The reinforced Lycra panel in the mid-section provides extra tummy flattening benefits. Made in the U.S.A. 3-Pack Mid-section panel provides extra tummy flattening benefits. Unnoticed under any garment. Available in colors: black and white 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> Hold both straps of the shirt and step into the garment. Pull up the garment and slide arms through armhole 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.