IST Compact Snorkeling Combo Set: Shatterproof Mask, Semi Dry Top Snorkel & Travel Mesh Drawstring Bag in Adult and Junior Sizes SEMI-DRY TOP  Semi-dry snorkel features a splash guard, corrugated flex tube and a bottom purge. DUAL-LENS MASK  Teardrop lenses with tempered glass reduce vision obstruction. ERGONOMIC DESIGN  Hypoallergenic mouthpiece and snorkel tube that drops away when not in use. QUICK-RELEASE TECH  Single-click button allows for easy snorkel detachment. GRAB AND GO  One convenient pack to snatch as you walk out the door to your next adventure.