The Cressi Sirena Mask has a single lens, and is designed for snorkeling, swimming and Scuba diving. The mask skirt is made from soft hypoallergenic black silicone with a double feathered edge for an excellent seal on most face types. The wide split strap further enhances to masks sealing ability. The visibility provided by the single tempered glass lens and the unusual shape of the frame extends in all directions. This medium volume mask has quick release strap buckles for easy adjustments. Mask is equipped with an easy-to-reach one-hand nose pocket for ear equalization which can be utilized even when wearing thick gloves.