【Two Click Buckle】It's easy to put on and take off with the fast adjustable buckle 【Anti - Fog&Anti-Leaking】The surface goggles are coated with anti-fog material, which provides clear view under the pool or outdoor swimming without outside reflection 【Suitable for Teenagers & Adults】Adjustable silicone headstrap, Soft TPU frame, offers a comfortable fit. Replaceable S,M,L nose bridges, which can be easily changed to fit swimmers with different face shapes 【PACKAGE includes】Nearsighted swimming goggles*1, Replaceable nose bridges*3, Earplugs*1, Nose clip*1，swimming goggles case*1.The outer eyes fit and Lightweight design will satisfy your daily use and training or competition for non-professional athletes IGym swim goggles are made of premium silicone.Flexible silicone frame and gasket provides maximum comfort. Polycarbonate lens is resistant to cracking. They offer the most value from their long life, high quality, and endless variety How To Prevent Fogging? 1. Do not touch or wipe the inner anti-fog layer. Activate the anti-fogging coating of inside lens by soaking the swim goggles in the water before swimming. 2. Make your skin cooler by splashing face and moisten goggles before swimming. 3. Swim goggles have a limited anti-fog life. A suitable anti-fog spray extends the lifespan. 4. Take a small drop of shampoo and gently rub it over the surface of the lens and rinse it out. 5. Spit on each lens and shake the goggles to make sure they are evenly coated. How to prevent leakage? 1.Make sure swim goggles sit on your nose bridge and around eyes comfortably and the sealing is perfect. 2.You may adjust the strap and feel a slight pressure from the swim goggles to your skin. 3.Wear swim goggles beneath your swim cap will keep them more firmly in place against your head. 4. Work on keeping a neutral facial expression. Making faces or squinting your eyes while swimming with goggles can cause your eyes to crinkle around the edges, your goggle's seal to break and water to leak in.