With the snorkel I could for 4 weeks to explore the underwater world from Bali and Lombok. The mouthpiece fits comfortably in your mouth, it penetrates diving no water in the snorkel and you should still have time make your mouth water, it is easy to blow. Just why the head is not lit in red warning color, not even a red ring is attached, do not open up to me. To this I would pay the next time.