Thanks to the use of 3D closed mesh fabric, the Pro Mesh BL Sleeveless Base Layer is quick to remove excess sweat from your skin, ensuring your body is kept dry & at a stable temperature. At the same time, this also means you don't get cold, clammy & uncomfortable from excess sweat build-up, even when the pace slows, or you pull over for a well-earned coffee. Even in cold conditions, it can be deployed below a winter-weight base layer to boost sweat-wicking to avoid the dreaded chill from too much moisture build-up. Pro by name & pro by nature, it's an essential addition to any dedicated cyclist's wardrobe.