The Fastlane goggle has an asymmetrical, anatomtical design, and when paired with the soft silicone skirt offers a natural, comfortable, watertight fit. The patented Strap Management System offers quick hassle-free strap adjustments plus four nose bridge options ensuring a perfect fi t. This is a perfect goggle for your everyday training needs. Curved lens: for an expanded field of vision. Adjustable nose bridge: 4 interchangeable size options for a perfect fit. Silicone innereye gasket: allows a leak resistant seal. Silicone straps Antiscratch Hypoallergenic FINA APPROVED