The Onda has a single tempered glass lens and is designed for adults. It is ideal for snorkeling, scuba diving, and swimming in open water. The skirt is made of soft hypoallergenic transparent silicone, ensuring comfort and an excellent seal on many face types. The visibility provided by the single lens, along with the unusual shape of the frame that extends in all directions, makes it ideal for having the scuba diving equipment under control. The length of the strap is easy to adjust, thanks to the quick-adjustable strap buckles.