The great looking Arena X-Vision Mirrored Swimming Goggles are Lightweight, Low Profile Race Goggles which have great Hydrodynamic Properties. These FINA Approved Goggles are for Competitive Swimmers, the Liquid Silicone Seal (Gasket) Design makes for a Better-Fit and Sleeker-Look. Goggles provide Enhanced-Forward Vision which Improves Head and Body Alignment when Swimming. The Gold Mirrored Polycarbonate Split Lenses with Anti-Fog Coating Provide Fog-Free Vision with UV Protection. The Goggles are equipped with a Durable Silicone Head Strap with RFA Adjustment, Wishbone Temples, has 5-Size Interchangeable Nose Bridges for a Custom and Perfect-Fit.