SWEAT IT OUT® with COOL COMPRESSION® technology fabric offers stretch and recovery of 200% in all directions (360°). No matter the weather, cold, moderate or hot, you’ll be comfortable. This Short Sleeve Compression Shirt will help reduce muscle vibration. This allows for more muscular efficiency = power with less pain. Help protect the shoulder, chest, upper back and obliques . 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.