TUSA SPORT UC1625 Serene Adult Mask and Snorkel Set includes a UM16 Serene mask and a USP250 snorkel. Constructed with crystal silicone the UM16 Serene has been crafted for divers who want a wide field of view combined with a low volume design. The USP250 dry snorkel features the TUSA Hyperdry Elite dry top technology that stops water from entering into the snorkel, a drain chamber and purge valve for easy clearing, with a hypo allergenic crystal silicone swivel and mouthpiece.