Scubapro Alpha 4 MM Neoprene Dive Boot for Cold Water DivingThe Scubapro Alpha 4 mm neoprene dive boot is designed for scuba and underwater use in temperate and cold water conditions. Its sport shoe inspired construction features a laced closure instead of a zipper, delivering a snug, comfortable fit while reducing potential failure points. The two layer construction combines neoprene and nylon with anti abrasion fabric for flexibility and durability in challenging diving environments. The Diamond Span lining