All-season usable Black base layer innerwear. Made of mesh material, to be worn under cycling jerseys. Regarding the size: L size is a little larger than M size. Because of the material's stretch, it should be fine even for those with larger builds. I myself have used the M size and thought it was a very good product. I think it's good to have several. Of course, it is a brand new, unused item. (Other than the item in the photo) Thank you. Type...Base layer Genre...Road bike