DIVING SET SIZE: ADULT MATERIAL COMPOSITION: MASK: FRAME: TEMPERED GLASS SEALING COLLAR: LIQUID SILICONE OUTER FRAME: PC INNER FRAME: PC DIVING TUBE: TUBE: PVC CONNECTION: PVC MOUTHPIECE: PVC BUTTON: PC BREAKWATER: PC SPECIFICATIONS: - TWO LENSES - TEMPERED GLASS - BREAKWATER - EASY ADJUSTMENT - BOTTOM VALVE