The first anti-fog mask for diving and snorkelling: the special plasma treatment on the lens guarantees a long-lasting anti-fog effect for a 100% clear vision. Frameless mask with one lens made of tempered glass with silicone skirt, for a wide field of view. Low volume mask: reduces internal space to facilitate equalization and ensure optimal performance in freediving and diving. 3D buckle directly integrated on the skirt, for fast, safe and accurate adjustment. SEAC Brand mask is ideal for recreational and professional diving and snorkeling.