Engineered for visibility, the Nike Swim Expanse swim mask is made with extra-large lenses. The Nike Swift Adjust buckle lets little ones quickly adjust their fit, and the wide strap and flex points allow for natural movement while maintaining a watertight seal. Benefits:Flex points allow natural face movement while maintaining a watertight seal. Wide, stretchy head strap provides a smooth, comfortable fit. Kids' fit accommodates smaller faces. [] Product Details:Product intended for ages 3-6. Lens:Polycarbonate, Frame:Polycarbonate, Nosebridge:Silicone, Strap:Nylon/Latex, Buckle:Polycarbonate. To obtain maximum benefit, keep lenses free from dirt and grease. Wash gently in clear cold water after each use. DO NOT wipe or rub the inside of the goggles. Style: NESSD124; Color: Game Royal; Size: One Size; Gender: Unisex; Age Group: Kids | Nike Swim Expanse Little Kids' Swim Mask in Blue, Size: One Size | NESSD124-480