This is the Aqua Lung EVO4 Drysuit Boot Scuba Diving Dry Suit Boots Features: Mid-height Lace pocket Ankle support Renowned Vibram Megagrip sole Thumb loop / donning aide Fin Keeper / doffing aide Low profile design allowing more fin choices Simple, quick, and easy lace up system Velcro plush heal works similar to Fusion boot for attaching to Fusion drysuit The EVO4 is the next generation of the military-proven EVO3. It is a mid-height lace up boot with a renowned Vibram Megagrip sole providing unparalleled traction and durability.