Whale Negative Optical Corrective Swim Goggle Mirrored Swimming Goggles Mirrored Swimming Masks with Anti-Fog Mirrored Degree Lenses(Negative -1.5 to -7.0 Diopters) for Women and Men Adult Available in diopters -1.5 though -700.0 If you need different diopters for left lens and right lens,remark the diopters when you buy this goggle. Swim goggle with custom diopter level designed for extra clarity under water Hypoallergenic silicone seal for water-tight fit.Anti-fog Treatment Mirrored lenses Soft silicone skirt and strap provide comfortable feeling Fast-fit head strap system and Curve lens provide wider vision.