Scuba Max Panoramic Legacy Three Window Diving Mask Panoramic and low volume design for maximum visibility High tech edgeless engineering delivers improved durability and flexibility Unique teardrop lens made from highest quality tempered glass Cleverly re-designed 360 swivel buckle: More durability with no more distortion of the silicone skirt! Allows facial movement and absorbs shock. Simple strap adjustment with single push-button durable spring system