National Geographic Snorkler Experience 3 Piece Set with Tuna 2S Mask, Wahoo Semi-Dri Snorkel and Tuna 44 Adjustable Fins Made from 100 percent hypoallergenic silicone Lenses are CE tempered for safe distortion free clarity Frame- Lightweight Derlin and plastic Mouthpiece has an orthodontic design for an optimal fit Feathered edge mask skirt National Geographic Snorkeler "Experience" Designed to comfortably fit the entire family; while maintaining quality, fit, performance and economics. Tuna 2S 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. Mask Skirt-feathered edge seal. Reuseable carry bag featuring mesh side, inside pocket for mask storage, heavy duty zip around zipper.