Why wear a base layer' It's all about comfort. Even the most high tech, form fitting jersey may not wick sweat away from your skin as fast as the lighter, thinner materials used in garments like the Gore Bike Wear Sleeveless Base Layer. No matter what you wear it under, it's an affordable way to stay as dry as possible on long rides, or to minimize chafing from bib straps or other agitators. You may even be able to stand a few more miles than usual before calling it quits. The Sleeveless Base Layer is meant to fit like second skin, and its polypropyleneelastane blend provides exceptional moisture management. The mechanical push pull effect of the fabric sucks sweat away from your skin to the outer layer, where it can evaporate. Flat lock seams enable the base layer to glide over your skin. And speaking of seams there aren't many to be found. Gore Bike Wear made the back extra long to cover your entire lumbar section. The Gore Bike Wear Sleeveless Base Layer is tight fitting and comes in sizes Small through XX Large. It's available in Black or White.