Light and protective, the men's On Performance Long-T is ideal for changing conditions. On cut the Long-T from a lightweight Japanese knit fabric for its ability to wick moisture away from skin, keep you warm when it’s cold and cool you when it’s warm. Designers also integrated an antibacterial treatment into the yarn to keep the shirt fresh after a workout. The long sleeve running T-shirt will keep you covered in the sun, and it will breathe easily when the weather heats up. When the skies are unpredictable, the On Performance Long-T has your back.