While the Delta 5mm boot is built more for temperate water diving, you get all the same features, fit, comfort and protection offered by the Delta 6.5mm, plus you have a wider selection of sizes to choose from. A sturdy outsole and rubberized armor provide excellent protection on both the top and bottom of the boot. The top of the foot is both cushioned and protected against abrasion from the edge of the fin pocket. Built-in arch support increases comfort when traversing rocky shorelines. The reinforced toe and heel caps extend boot life. The heel cap includes a molded fin strap keeper. The long zipper is great for easy donning and doffing and is fitted with a gusset to cut down on water seepage. The aggressive anti-slip tread is non-marking, a feature boat owner will always appreciate. Hook and loop zipper-end patch secures the side zipper when closed. The Scubapro Delta Boots are made from nylon-2 neoprene rubber with glue and sewn seams. Boot is black in color.