Columbia Base Layer Midweight Long Sleeve for Men The Columbia Base Layer Midweight Long Sleeve for Men is a suitable garment for all your workout sessions. Made of 85% polyester and 15% elastane sweet rev, you get durability, comfort, and adequate stretch. The Omni-Wick inserts under the arms and on the torso wick away sweat and keep you dry throughout the day. Thanks to the Omni-Heat thermal reflective lining used, you have a breathable and warm base layer to wear during the winter. Its fabric remains odor-free as this shirt has an Antimicrobial treatment to prevent bacterial growth. plus, it allows you to stretch and flex your whole upper body due to its four-way comfort stretch and ergonomic seaming. So if you are looking for something to wear during all your physically demanding activities, get the Columbia Base Layer Midweight Long Sleeve for Men!