100% hypo-allergenic silicone. Advanced Fit Technology (AFT): alternating matt and polished zones on the skirt. The best water tight seal and comfort. The frame is made of innovative techno-polymers reinforced with inorganic fillers. Shock-resistance, durability. 4 mm tempered glasses, Cardanic Joint Buckles, 100% Silicone strap with enlarged headpiece ensures a good visibility of the diver underwater.