National Geographic Snorkler Expedition 3 Piece Set with Swordfish 6S Mask, Wahoo Semi-Dri Snorkel and Wahoo 48 Full Fins National Geographic Snorkeler "Expedition" is a blend of our "Explorer" & Experience" levels; to help create a great value. Snorkeler set comprised of complimenting sized components considered easily used for entry level diving activites. Swordfish 6S Low Profile Double pane, Drop Down CE Tempered lenses. Frame-Lightweight Delrin and plastic. Mask Strap-flexible and replacable with - 3 point hold. Ratchet Quick lock (RQL )- mask strap adjustment. Silicone Mask Skirt-feathered edge seal. Reuseable carry bag featuring mesh side, inside pocket for mask storage, heavy duty zip around zipper. Wahoo Semi-Dri Snorkel - Silicone Snorkel features orthodontically designed mouthpiece for maximum comfort; semi dri (splash-guard) & easy mount snorkel tab.