These are the 5mm Zippered NeoSport Scuba Diving Booties with Zipper They Feature: A top choice among active divers Tough zip-up boots provide maximum thermal protection and foot support Whether navigating wet boat decks or sandy shores, the high-traction sole provides real stability, especially under the heavy load of scuba gear #10 zipper is backed up by a special Water Entry Barrier that prevents water exchange and helps keep feet toasty warm Durable traction sole, glued & sewn, WEB - Water Entry Barrier", #10 heavy duty zipper NeoSport's unparalled combination of product features and benefits coupled with a focus on efficient manufacturing techniques and material selection has propelled Neo Sport products to be viewed as an exceptional consumer value. Pick up a pair of these awesome boots today!