ZS1 is the small version, suitable for adults with narrow faces, of the Z1, a frameless mask that boasts a low internal volume while offering a wide field of view in all directions. The specific design uses the assembly of the silicone skirt directly over the single glass. This system guarantees great sturdiness and a perfect watertight seal. The lower weight of the mask makes it ideal for travel. The flexible fit and reduced drag are appreciated for freediving and spearfishing, snorkeling, and diving. The buckles are completely tiltable and with immediate regulation of the strap length with one hand. The anchoring of the buckle system on the mount prevents deformation of the silicone facial during the use of the mask (typical of the models that anchor the buckles on the facial itself) and the tension of the strip is produced aligned with the plane of the glass, optimizing the level of proximity of the eye/lens to the user's taste and, therefore, the volume and optimal visibility of the mask.