Dr.B Optical Swim Goggle Corrective, Anti-Fog UV Protection, No Leaking, Easy Adjusting for Adults Men Women, incl. Free Carry Case #32295 High quality molded lenses with UV protection, available in 14 corrective diopters: -0.0/-1.0/ -1.5/ -2.0/ -2.5/ -3.0/ -3.5/ -4.0/ -4.5/ -5.0/ -5.5/ -6.0/ -7.0/ -8.0 for near-sighted swimmers (Same diopter for both eyes! Customized optical goggles are available. If you have different strengths for two eyes, please specify your diopters in the order.) Durable anti-fog coating for crystal clear vision: you can see clearly underwater and enjoy swimming as long as you want when swimming for training and recreation. Super soft TPR seals for comfortable fit. The goggle comes with a free carry case! Easy to adjust nose bridge system: Interchangeable flexible nose bridges in three sizes! Changing out the nose pieces is so easy through a simple "180 twist-and-pop" replacement process. Simple strap adjustment: Silicone head strap with easy-to-adjust back clip makes the adjustment very simple. Pull both strap ends outwardly to the desired tightness. To loosen the straps, pull them away from the goggle.