Product description 1.COMFORTABLE WEARING: Ergonomic design with 3D frame, soft silicon gasket, adjustable strap, and 3 sizes of nosepieces fit the unique contours of your face, giving you comfortable wearing experience 2.ANTI-FOG: The swim goggles is coated with anti-fog treatment on the inner surfaces of the lenses, giving you a clear underwater vision without blurring or distortion; do not wipe or rub the inner side of goggles lenses 3.NO LEAKING: Soft memory silicon gasket and double-deck seal ensure a snug fit on different face shapes and keep water out of the goggles so that you can swim freely without distractions 4.UV-PROTECTION: UV-protection coatings on the mirrored lenses of goggles can reflect harmful UV rays and bright lights, protecting your eyes from the damage of the sunrays; perfect for both indoor and outdoor swimming 5.ADJUSTABLE: Turn the strap adjustment button to the side. Tighten or loosen the strap to fit your head size. Replace the adjustment button so that the goggles can fit for your size.