Promate Fish Eyes Snorkeling mask Goby Dry Whistle Snorkel Combo Set Package includes Promate Fish Eyes snorkeling mask (mk260) and Goby dry whistle snorkel (sk890) 2-window snorkel mask features highest grade silicone for comfortable seal and push-button buckle allows for easy, quick strap adjustment Submersible Dry top Snorkel with Built-in whistle housing. Quick slip-in snorkel keeper. Silicone purge valve for easy draining. Shipping & Handling Charge or tax may occur, please check other shipping options and applicable costs in the Shopping Cart during checkout.