Review on Panzexin Swim Snorkel: Advanced One-Way Purge Valve for Lap Swimming and Snorkeling Training by Doug Layman

I am an experienced swim ring and have used many snorkels over the years to avoid having to turn my head (recommended by my doctor after spinal surgery). This is the best tube I've ever used. Unlike the bulky, oversized, and more expensive Michael Phelps model I've tried before, this model doesn't allow water to enter the tube and is completely trouble-free. The Phelps model kept filling up with water - I couldn't figure out why - and I had to stop and take the snorkel out of my mouth to drain the water every few laps. I've been using this product for a few months and I'm very happy with it.