High, neoprene, and dry.
+ Absolutely waterproof seams.
+ Hook-and-loop tightening and adjustment on top of the foot to keep the boot snug and prevent it from slipping off in the thick.
+ An adjustment strap around the upper calf.
+ To decrease the chance of any water going in the inside of the upper lip have smooth skin neoprene, creating a tighter seal when sinched, in case you get a little too deep
+ Very easy to put on or take off.