This is the 4th Element 6.5mm Amphibian Dive Boot with Ergonomic Footbed Features: Ideal for shore diving Ergonomic footbeds / insoles Heel and arch support Underfoot cushioning Double layer reinforcement Heavy-duty zip and stopper Fin strap retainer The Amphibian diving boots are designed for a diver who wants the ultimate in support and protection. A stable footbed and hardwearing moulded outsole make this ideal for regular shore diving. The Amphibian's hard wearing optimised outsole gives a superior level of grip and maximum stability. This makes it ideal for shore diving, negotiating entry to the water especially over slippery rocks.