The Mens Under Armour Heat Gear Sonic Compression Long Sleeve T-Shirt is an ultra-tight second skin which delivers a locked-in feel that keeps your muscles fresh & recovery time fast. Its ultra-soft fabric provides extreme comfort giving you compression without restriction; in addition the long sleeves are ideal for keeping you warm during outdoor activity in cold weather. Features 4-Way Stretch fabrication allows greater mobility & maintains shape Signature Moisture Transport System wicks sweat away from the body Anti-Odour technology prevents the growth of odour causing microbes Smooth, chafe-free flatlock seam construction Glossary 4-Way Stretch Lightweight construction that stretches both laterally & vertically for enhanced mobility & accelerated dry-time. Moisture Transport System USAs signature, sweat wicking technology pushes sweat away from your body to the surface of your gear so it dries faster. Anti-Odour Keeps gear fresher for longer by preventing the growth of odour microbes.