Anti-Fog and Ultra-Wide Field of View These swimming goggles have an anti-fog coating on the inner surface and a one-piece frame design for crystal clear and ultra-wide field of view underwater. Kids can focus on the fun of swimming with them. Ergonomic design and leak-free 3D ergonomic cups and super elastic straps to reduce eye pressure. Years of design and manufacturing experience, the anti-leakage effect protects children's eyes from chlorine and raccoon eyes. Skin-Friendly Silicone and Comfort Fit Kids Swimming Goggles are made of non-toxic and ultra-soft silicone, which is comfortable and skin-friendly, reducing friction with the eye socket and avoiding redness and swelling. One-touch closure and easy adjustment One-touch closure and adjustable buckle support easy on and off without tangling your child's hair. They are suitable for kids ages 4-12.