This is the Tusa SS 5mm Dive Soft Sole Boot Scuba Diving Booties Features: 5mm neoprene boots Durable large tooth YKK zipper Rubber sole for sure grip on wet surfaces Jersey interior provides added warmth Glued and sewn seams for durability Keeps feet warmer longer The TUSA 5mm soft sole boot is a comfortable, light weight boot that is ideal for all types of water activities. If your feet tend to get cold even in tropical waters, the 5mm soft sloe boot is your best choice.