Assos Summer NS Skin Layer p1Assos took their Summer Skin Layer and stripped it down even further. This new sleeveless version is lighter, stretchier, and moves more air than the last one, about 15 percent lighter, actually. No bulk under race fit sleeves, no seams fighting your jersey. Just a true second skin base that disappears once youre on the bike. The fabric uses a more open structure to cool better when the temperature spikes, and the fit wraps the body without feeling