5mm Heiwa Smoothskin Open cellHeiwa is an excellent mid range, solid, hardy wetsuit that maintains its thickness well when you dive under and over time. If you're paranoid about your wetsuit compressing over time, and don't mind something a little less flexible (but still great) Heiwa is great and will last you for years to come Smoothskin open cells: The warmest, fastest, most comfortable and flexible fit you will ever wear. If you're into competitions these are the wetsuits you