Z1 is 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 micrometrically adjustable buckles are comfortable and effective. Frameless Dive Mask Frameless Technology Cressi Micrometric Adjustable Buckle Tempered Glass