The Ion 4 Mask is ideal for Scuba Divers, Snorkelers, Freediving, and Everyone in between. It's Dual Lens Tempered Safety Glass Lens Design with Easy to Reach Nose Pocket allows for Easy Nose Access for ear clearing (equalization) and places the Lenses closer to your eyes Increases your Visual Clarity and Field of View. The Low-Profile Design means you'll experience Less Drag and Increased Comfort at Depth. The Accent Mask has a Double Feathered Edge Skirt for a great seal with Buckles that are Easy to Adjust, allowing a Custom Fit. The Accent Mask now includes a Neoprene Comfort Strap that won't get tangled in your hair and the Soft Neoprene Rubber Design increases Comfort.