The Vogel's frame is made of Grilamid TR-90, a homopolyamide nylon that has an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Hydrophilic rubber ear and nose pieces give them a no-slip fit. You'll be McLovin the Vogel's frameless design. The absence of a frame on top of the lens means there's nothing obscuring your view when your in the riding position looking forward. This means you can look further ahead of you without sitting up or craning your neck.