Mares Flexa DS 5 mm Dive BootMares' Flexa DS Dive Boots are made from durable neoprene with a hard rubber sole to ensure grip. The strong zipper allows easy donning and doffing and prevents water entry. The exclusive DS drainage system prevents the boot from sucking to the fin Easy to put on and off Also suitable for longer distance walks to the dive sites 5 mm FACT THICKNESS: 5mm