Under Armour Mens HeatGear&reg; Renegade Compression Short Sleeve Medium Carbon Heather Smooth Fabric - Provides extreme comfort and compression without restriction 4-Way Stretch Fabrication - Allows greater mobility and maintains shape Signature Moisture Transport System - Wicks sweat away from the body, keeping you cooler and drier. Anti-Odour Technology - Prevents the growth of odour causing microbes Smooth Flat Lock Seams - Allow a full range of motion without chaffing