IST Ballena MaskThe Ballena is a new and modern snorkeling or diving mask. It has been designed to be the favorite mask for any adventure. The Ballena has a purge valve that allows for hand free water clearing. It pairs crystal clear twin lenses with a comfortable low volume silicone skirt for an excellent view. The advanced buckle system is attached to the skirt to allow free movement and to collapse flat for safe transport. The result is a very comfortable mask that fits nearly all facial profiles and offers advanced features to optimize your underwater experience. See the SN201 3D FLEX snorkel for a perfect color match and similarly advanced technology for the ultimate aquatic safari! Low internal volume. Purge valve. Unsurpassed field of view. Superior comfort and fit. Advanced buckle system. Compact and lightweight. High quality hypoallergenic Silicone. CE approved. Imported.