Deep Blue Gear Maui Diving and Snorkeling Mask, Optical Lens Ready Diving mask that's ideal for both seasoned divers and novice snorklers Dual scratch and shatter resistant tempered glass lenses; accepts optional corrective optical lenses (sold separately) Double-feathered silicone mask skirt ensures a secure seal and comfortable fit Durable swivel buckle for easy optimized strap adjustment One size fits most adults and kids over 10 years old; available in 8 colors