Oceanic 6.5mm Neo Classic Heavy Duty Dive Boots Virtually impenetrable molded sole with non-slip tread, superior arch support and stress reducing heel air bubble Reinforced pull tab and rear seam eliminate stress on neoprene when donning Velcro zipper flap ensures that the zipper will stay closed securely during the dive 6.5mm double-glued and blind stitched neoprene construction for longevity and reduced water flow