The most cost conscious segment of the National Geographic Snorkeler Line of equipment. It is the best choice for those who simply want to experience snorkeling in an “as economically feasible” manner. The Nat Geo Experience Series line maintains a level of quality, fit and performance worthy of the brand. Designed to fit the entire family budget. Masks - CE Tempered Lenses for safe distortion free clarity. Lightweight Delrin ™ and advanced lightweight plastics frames. Feathered edge mask skirt seals comfortably and distributes sealing pressure. Pliable non feathered nose piece for ease of equalization and mask clearing. “Ratchet quick lock” masks strap adjustment. Flexible replaceable mask strap with “3 point hold” design.