National Geographic Snorkeler "Expedition" Masks & Snorkel Set. 100% Silicone , Hypoallergenic mask - Toucan Yellow * Low Profile Double pane CE Tempered lenses. Frame-Lightweight Delrin and plastic. * Mask Strap-flexible and replaceable with - 3 point hold. Ratchet Quick lock (RQL)- mask strap adjustment * Mask Skirt-feathered edge seal. * 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