EXTRA OR REPLACEMENT TUBE for our new full face snorkel mask: It’s Here!… & Snorkeling Will Never Be The Same. THE SEAVIEW 180° V2 has been meticulously designed with the highest quality features to create an unmatched snorkeling experience. Increased airflow and decreased resistance. With full face maximum visibility and our patent pending Flowtech Technology, you will enjoy your adventures more than ever before. Watch the video at the bottom of the page to learn about choosing the correct size, usage, and how the mask works.