ASSOS Men's NS Superléger Skin LayerAerodynamic race jerseys dont leave any room for error in base layer fit, so we designed the new NS Skin Layer to fit unobtrusively beneath a second skin jersey while still wicking and cooling better than bare skin alone. The Push Pull sleeves of our race jerseys are at their best with a sleeveless base layer, so we opted to omit sleeves altogether in favor of designing the lightest, most breathable, and least bulky layer possible.