ROKA F1 Swim Goggle Low Profile with Anti-Fog Coating Lens: 38mm (W) x 28mm (H) premium grade polycarbonate lens Gaskets:Soft, protective & hypo-allergenic silicone gaskets; no latex, no PVC Lens Coating: Anti-fog coating Nose bridge:Three interchangeable nose bridges Strap: Flat silicone head strap with locking adjustment clip