Whether you're running spiritedly down the trail or pedaling up a mountain pass, the Gore Wear Men's Base Layer Sleeveless Shirt layers effortlessly underneath your favorite jersey in a wide variety of conditions to keep you pleasantly cool and dry. You can also wear this sleeveless base layer as a standalone piece on the warmest days of the year while you're running and training. Lightweight fabric actively pulls moisture off your skin to prevent overheating during intense physical activity and features a high degree of stretch for full range of motion. Additionally, Gore uses minimal seams to prevent irritation from curbing your cycling and running ambitions.