Deep Blue Gear Diving Snorkeling Mask (Maui) with Optical Corrective Lenses Soft liquid injected 100% 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. Ideal for recreational diving and snorkeling.