Cressi Liberty Triside The Liberty-3 Windowed Mask Side Lenses are Precisely Fit to the Main Front Lens for a nearly Uninterrupted Field of View. The result is a Mask that allows Maximum Light and Feels Open as the Ocean itself! All 3 Lenses are made from Tempered Glass incased in a Tough and Durable Polycarbonate Frame with a Soft 100% High-Quality Silicone Rubber Skirt. The Liberty-3 Skirt has a Double Feathered Edge for a perfect Seal on the Face and the Quick-Adjust Ratcheting Mask Strap Buckles provide a Secure Fit and are Easy to Manipulate, even while wearing gloves. The Mask Strap is of a Split Strap Design for even pressure on the face to Increase the Seal. Mask has an Easy-to-Reach One-Hand Nose Pocket for Ear Equalization. Mask is a Medium Volume Design, available in 3 color choices of, All Black, Black/blue or Clear/yellow, comes with a Hard Protective Plastic Mask Box and is covered by a 12 month limited warranty. - 3 Windowed Mask - Lenses Precisely Fit to Main Lens for Nearly Uninterrupted Field of View - Maximum Light and Feels Open as the Ocean Itself! - Tempered Glass Lenses - Tough and Durable Polycarbonate Frame - Soft 100% High-Quality Silicone Rubber Skirt - Double Feathered Edge Skirt for Perfect Seal on Face - Quick-Adjust Ratcheting Mask Strap Buckles - Buckles Provide Secure Fit, Easy to Manipulate with Gloves - Split Mask Strap Design for Increased Comfort and Fit - Easy-to-Reach One-Hand Nose Pocket for Ear Equalization - Hard Plastic Mask Box