Tilos Panoramic, Scuba Diving Snorkeling Double Lens Mask Patented Panoramic Design, Seamless Side Tempered Glass Windows for Unobstructed View Easy and Quick Strap Adjustments Foldable and Flexible Buckle Attachment that Swivel with Facial Movement Great Seal Regardless of Diving Conditions, Low Volume Mask Design Feathered Edge & Wide Split Strap Combined for Comfortable and Perfect Seal on Face