National Geographic Snorkeler Explorer Two Piece Combo: Swordfish 6 Mask and Swordfish Semi National Geographic Snorkeler "Explorer" Masks & Snorkel Set. 100% Silicone , Hypoallergenic mask - Deep Blue Low Profile Double pane CE Tempered lenses. Frame-Lightweight Delrin and plastic. Clear wide field and increase periphial vison. Mask Strap-flexible and replaceable with - 3 point hold. Ratchet Quick lock (RQL)- mask strap adjustment Mask Skirt-feathered edge seal. Open Frame; clear silicone skirt offer snorkeler some periphial light / vision Semi Dry Marlin Snorkel with Splash Guard. Wide Breath tube for comfort and ease of breathing and air displacement. Silicone Mouthpiece (orthodontic design for maximum comfort) Patented "Pinch & Lock" Snorkel Tab; East to attach and secure to your mask