Taking a look in the underwater world. The Tincture diving mask is made of flexible siltier material, which creates a perfect fit. The siltier material adjusts itself to the shape of the head. The glass of the diving mask is made of safe tempered glass. The diving mask has an easy and fast adjustable buckle on both sides. The buckle makes sure that the diving mask stays tight on the head. You can adjust the buckles by pressing these knops.