Review on Unigear Full Face Snorkel Mask - Panoramic 180° View with Advanced Safety Breathing System, Snorkel Set for Adults - Anti-Leak, Anti-Fog & Safe Breathing by Aaron Jimison

This snorkel is fully adjustable and will easily fit both adults and teens as you can adjust the straps on the back. There really aren't any gaps when you adjust the straps to fit snugly around the back of your head. What I thought was cool about this snorkel was that the front end never fogged up while diving. Under water I had a clear view the whole time. It was in my pool but I could still see underneath it and it never fogged up. You have the opportunity to float on the water surface, so you can breathe all the time. The other option is immersion and what I found interesting is that while you can still breathe, you don't have to worry about water getting into the mask every time because there is a stopper inside to prevent this. Since I have a chlorine pool, water stains can remain on the mask, but with a little soap and water they just go away. Took this on a short day trip to the lake and was able to use it in the water. While there wasn't much to see it was just great to be able to use it underwater when I normally couldn't unless I didn't have a snorkel.