Open Box Seac Set Unica L/XL S/KL+Sprint Blu L/XL Full Face MaskFun guaranteed with the Seac Unica Sprint snorkeling set, the first SEAC set that offers the popular Seac Unica full face mask with Seac Sprint open heel fins. The Seac Unica snorkeling mask allows you to breathe underwater with nose and mouth. The special breathing system with two different channels for exhaled and inhaled air allows a vision always clear at 180, never fogged, and a more natural feeling during breathing. No effort and no noise, just