SWEAT IT OUT® with COOL COMPRESSION® technology fabric offers stretch and recovery of 200% in all directions (360°). This Sleeveless Compression Shirt will help reduce muscle vibration. This allows for more muscular efficiency = power with less pain. Help protect the obliques, chest, and upper back. Wear as a first-layer next-to-skin garment during daily activities with more confidence! Care Instructions: NO BLEACH! Machine wash cold, tumble dry warm. DO NOT Iron. NOT TO BE WORN WHILE SLEEPING.