Silicone frame Anti-Fog Coating coating ANTI-FOG & WIDE CLEAR VIEWEach lens is carefully coated with the optimal amount of advanced anti-fog coating, it can stop the lenses from becoming steamy and offer you a clear and long distant view to focus on swimming under water with 180-degree peripheral vision. Note Do not touch the lenses inside surface by hands or any sharp tools, or it will damage the lenses, damage fog function. SUPER-SOFT SILICONE SEALSThe silicone gaskets are super-soft and comfortable. They create a perfect seal every time due to their double-seal design, they are around the eyes, which can distribute the pressure evenly and provide a maximum comfort, never leave red marks around eyes and nose for hours after swimming. 3D ERGONOMIC FIT DESIGN The goggles regard the type as washer, which draw on the mechanical principle of the thin shell structure, disperse the pressure effectively and it is comfortable to wear. Moreover, the goggles frame designed by curved ,so it can fit your eyes perfectly and avoid water leakage, keep your eye away from bacteria from water and keep your health. EASY to USE with ADJUSTABLE CLASPEasy adjustment of the elastic strap and SOFT SILICONE SEAL ensures a COMFORTABLE and snug fit for most face types. The strap is easy to adjust between sizes and the quick release clasp on the side means you can fit them in seconds without getting them tangled in your hair.