Aqua Lung 3mm Superzip BootsThe 3mm Superzip has an extra thick sole, heavy duty protective panels on the upper, and a durable zipper to withstand years of use without tearing. This is the boot for an avid diver who needs to be prepared for cold water, rough terrain, less than luxurious boats, and murky, low viz conditions that hide hazards. Features: Ergonomic: Like the rest of the Aqua Lung boot line, the Superzip uses our patented, anatomically correct ERGO shaped footbed and