New Oceanic Ion 4 Scuba Diving & Snorkeling Mask (Ice Blue) with FREE Neoprene Comfort Strap included ($12.95 Value) - Optional Prescription Lens are Available Same great fit and style as the Ion with side windows for increased peripheral vision Sturdy lightweight frame Low volume design for wide field-of-view and easy clearing 100% liquid silicone for comfort and long-life Tempered glass lens for safety Easy adjusting buckles for convenience FREE Neoprene Comfort Strap included ($12.95 Value) Prescription Lens available for the "Ion 4" Mask Prescription Lens are professionally installed and pressure tested for FREE when you purchase your "Ion 4" lens on the same order