DESIGN & FIT: Mask & snorkel combo Premium design that's lightweight and made with a silicone skirt to ensure comfort and perfect seal Dive mask with inclined glasses, a patented technology of Cressi Features a float mechanism that closes instantly, preventing water from entering snorkel if submerged Wider elliptical bore shape increases airflow capacity for more comfortable breathing Purge valve enables instant clearing when needed Highly flexible silicone corrugated tube to reduce jaw fatigue Mouthpiece is made of soft hypoallergenic silicone that is replaceable and can be removed for cleaning Smaller profile with slight tilt for a closer mask fit