“Duke is the snorkeling visor that allows you to explore the underwater world from the surface. Duke offers a natural breathing experience due to the absence of any valve (patent pending), and a fog-free vision obtained by the lateral deflector mechanism (patent pending). A lateral air channel system, for inhaling and exhaling, drastically eliminates any breathing effort thanks to a reduced airflow length circulation (patent pending). The face skirt is made of soft hypoallergenic silicone that ensure comfort and a perfect seal. The snorkel top has a floating valve that closes the tube when submerged avoiding entry of water. The two x-cross straps are easy to adjust for a perfect adaption to your head. Frame and visor made of polycarbonate. The Duke is entirely designed and developed in Italy by Cressi and made in China. Cressi is a brand pioneer in scuba diving, snorkeling and swimming equipment. The product is covered by a 2-year limited warranty.”