TYR's Nest Pro Goggles sport a unique design. Inspired by Beijing's main stadium for the 2008 Olympics, the nest-like structure provides additional rigidity to the goggles' frame. A large, soft, one-piece Thermo Plastic Rubber frame and gasket comfortably seals out water and features an over-molded nose bridge. The Cellulose Propionate lenses provide wide peripheral viewing, anti-fog properties and UV protection. And, the Double Varied Tensile Strength silicone head strap provides a secure fit and is easy to adjust.