The Icebreaker Men's BodyFit 150 Ultralite Anatomica Tank Top is your first layer whether you're heading to the gym, trail running, or just working in an office. Its merino wool regulates your body temperature so you're neither too warm nor too cold, and it stays fresh after an extended time. It's also highly breathable so you stay comfortable while you work out. Lycra pulls this tank tightly across your body for an unlimited range of motion and it makes layering as easy as can be. Once you put this tank on, you won't want to take it off.