adopting sturdy and unbreakable bendable ABS material, that can meet different nose bridge heights and width for adults teens and kids, avoiding leaving a red mark around the nose and hurting nose.Flexible silicone frame allows the goggles to comfortably fit any face shape. Keary Adult Youth & Kids Goggles' inner lenses are coated with the latest anti-fog treatment to let you see clearly underwater without blurring or distortion. The outer surfaces coating lenses with UVA/UVB protection which can help protect your eyes from being hurt by UV and bright lights. And the mirrored lenses can provide a darker view by reflecting light away from your eyes.