The Sirena has a single tempered glass lens and is designed for snorkeling, swimming and scuba diving. The skirt is made from soft hypoallergenic transparent or black silicone. The visibility provided by the single lens and the unusual shape of the frame extends in all directions. Excellent seal on most face types, thanks to the internal seal ring housing average internal volume. It has quickrelease strap buckles.

The combo includes the Island 2.0 snorkel