The MAAP Team Mesh Sleeveless Base Layer is a sleeveless cycling base layer for hot rides, cut to sit next to the skin beneath a jersey. Its neckline is shaped for jerseys with low-profile collars, so the layer stays out of sight and out of the way. What Our Gearhead(R) Experts Are Saying:"Under a jersey on a long summer ride, this layer stays flat against my skin, so the jersey slides over it instead of catching and bunching. The mesh keeps air moving where the jersey sits closest, which is why I'm still comfortable at the end of a hot day."