Aerator designed primarily for snorkeling. The tube, curved in shape to stay as close as possible to the head, has a variable section and ends at the top with a shaped splash guard, which limits the entry of water and splashes from the upper end, without impeding ventilation. The mouthpiece, made of soft silicone, has an angle designed for prolonged use without soreness of the gums. At the bottom the pipe ends with an axial water collection well, equipped with an elliptical drain valve, which makes the expulsion of the water really easy and easy. The quick coupling system to the mask strap is sliding on the aerator tube for optimal positioning.