The AKONA 6.5 mm Boots are a durable nylon II neoprene snorkeling and divewith a ribbed and durable rubber sole for comfort and Anti Slip design. The 3mm thickness of boot provides toughness while maintaining warmth in waters 45to 75 degrees. Boots are equipped with strong and durable zippers with sealingflap behind zipper to prevent water seepage. All seams are glued-and-sewn andthe boots top edge is elastic taped and sewn. Boots are available in multiplesizes from 5 to 13, and are black in color.