The Aqua Lung Ergo Neoprene Sock: High Top is designed for comfort with a wetsuit or dry suit. The ergonomic, left and right foot specific design reduces bagginess for a warm and smooth fit. The sock helps prevent blisters while wearing open heel fins and increases warmth with glued and blind stitched seams. Ergonomic left and right foot shape Durable elastic bound cuff This version DOES have Grip on the bottom 3mm neoprene