Great for those who require magnification for eyewear that is not prescription, like sunglasses or diving masks. Hydrotacâ„¢ lenses can be trimmed to size with a sharp scissors and positioned anywhere on the lens. Use the included protective case to keep them safe when not in use. - 1.2 inches in diameter - Material: Polymer aspheric - Removable and reusable - Trim with scissors to customize shape - Molded protective case included - Unisex