Description: Our glasses are designed for nearsighted people who can not barely see the finishing line ahead of them. Well constructed by durable material which is anti-fog, UV protective and comfortable to wear. Flexible head strap fits any sizes. What are you waiting for? Get it and enjoy your swimming. Specification: Material: Silicone + PC Color: Black Type: #1 / -200°, #2 / -250°, #3 / -300°, #4 / -350°, #5 / -400°, #6 / -450°, #7 / -500°, #8 / -600°, #9 / -700°, #10 / -800°(Optional) Overall Length: approx. 18cm / 7.08" Lens Length: approx. 8.5cm / 3.34" Lens Width: approx. 4.2cm / 1.65" Package Weight: approx. 126g Package Includes: 1 x Swimming Glasses 1 x Storage Bag 3 Pair of Nose Pieces 1 Pair of Earplug Cautions: 1. Don't touch the lenses by hand or hard materials. 2. Before use, adjust the nose-belt and band for waterproof and comfortable wear. 3. To enhance the anti-fog effect, dip the lenses in clear water for a few seconds before use. 4. After use, clean it in clear water and keep it in a cool place, don't dive it in the deep water, as it can cause painful on your eyes. Direction: 1. Nose-belt & head strap could be adjusted according to your size in need. 2. Put the goggle on your face, eyecup cover eyes & strap on 45 angle to prevent leakage of water. 3. Put the goggle in water before a swim for long-time anti-fog consideration. Do not scratch the lens by nails or other things to keep clear sight.