A silicone mask of low volume, made in Italy by Cressi. The monocular mask Onda is designed for swimming and independent diving. Its frame is made of soft, transparent, and hypoallergenic silicone. The single lens provides a wide field of vision, and the unique shape of the frame extends in all directions. It offers an excellent fit for various face types and has a medium internal volume.

Before the first use of the mask, we should apply white toothpaste (not gel) internally on the lenses and the silicone of the mask. Typically, this toothpaste contains particles that assist in cleaning. The pressure we apply should be gentle to avoid leaving marks on the lenses. We let the toothpaste sit for at least 2 hours, and then we thoroughly rinse the lenses and the interior of the mask with lukewarm water. Ideally, before each use of the mask, we use an anti-fog solution.