The Akona Breeze Mask is a dual tempered glass lens mask that accommodates prescription lenses. The liquid silicone injected skirt has a double edge for smooth and effective sealing to the cheeks and forehead. The easily adjusted quick disconnect buckle system allows simple adjustments to the mask strap with no slipping.Mask has a wide split strap design that works in concert with the double edge of the skirt for a perfect seal on the face. The Breeze Mask has a large easy to reach one hand nose pocket for ear equalization. Optional prescription lenses available in negative diopters -1.5 through -8.0; in 0.5 increments