Mens Sleeveless Compression Shirt Running Workout Athletic Tank Top T-Shirt by X31 Sports LIGHTWEIGHT COMPRESSION - This mens sleeveless running shirt has next-to-skin feel without restriction, allowing for use even as a baselayer for all-season wear. ERGONOMIC FLAT SEAMS - The construction of this muscle tank top allows for smoother movements and reduced chaffing while running, lifting weights or training in the gym. MOISTURE WICKING - The fabric of these compressions shirts pushes sweat to the surface without hindering range of motion for dry, comfortable performance. 4-WAY STRETCH - These sleeveless compression tops are ideal for just about any activity including running, weight lifting, yoga and cross training. ATHLETIC FIT - The X31 Sports sleeveless compression shirts for men were specifically designed with the athletes body type in mind.