Bad posture can really be a pain in your back but, with a posture corrector brace, your upper body has the additional support it needs for better alignment. Our Men’s Posture Corrector Shirt is designed to offer support to the muscle groups that are instrumental to better back health. In many cases, rather than using our muscles to support themselves, people rely on the spine, which was not intended to support your head and upper body over long periods without muscular support. This men’s posture corrector shirt mimics those tight, compressed support muscles, resulting in a healthier posture for less pain. Underworks Men Posture Corrector Shirt, Firm Compression Better Posture, Better Health The Men’s Posture Corrector Shirt is perfect if you find yourself slouching from the office grind, have a weaker back due to injury or instability, or just want a more powerful, confident posture. Engineered to support the upper torso muscles your body uses to maintain good postureResistance bands cross your shoulders and down your sides, while midriff compression mimics an engaged abdominal area to counteract the upper bands.Specially contoured back helps avoid lower back slouching and stoopingOuter shell is a nylon-spandex tank for discrete use under clothingDesigned and manufactured in the USA of US-made materials. Underworks Men Posture Corrector Shirt Compression Level: Firm Compression Style: Full Tank Construction: Single layer Fabric Composition: 87% Nylon / 13% Spandex Size Chart and Care Chest measure (in inches) MEASURE YOUR CHEST: With arms down on side, take a snug measurement around the fullest part of your chest over the nipples.HOW TO WEAR: Hold both straps of the shirt and step into the garment. Pull up the garment and slide arms through armhole and adjust for comfort. Make certain that loose panel inside is again the back.HOW TO CARE: Wash in cold water, gentle cycle, tumble dry low or flat dry. No bleach, no iron. X-small: 28 - 31 in Small: 32 - 35 in Medium: 36 - 39 in Large: 40 - 43 in X-large: 44 - 47 in 2X: 48 - 51 in 3X: 52 - 55 in