Deep Blue Gear Diving Snorkeling Mask (Spirit 2), Different Strength For Each Eye, Black Soft liquid Injected completely silicone mask skirt sits comfortably against your face and provides a secure fit Stainless steel roller pin buckle assembly for durability and easy mask strap adjustment Scratch resistant tempered glass lenses Versatile fit for both adults and older children Note: to order different strength lenses for OD and OS, Please send US a message when placing your order stating "need different Strengths for each Eye"