The Zip Fin utilizes patented "Natures Wing"  "split fin"  technology which results in a fin which significantly reduces ankle fatigue for fitness swimmers, allowing for a full-leg workout that can be sustained for a longer period of time.  The unique blade features specially engineered side rails, flex channels, and stiffening battens that combine to make the Zip fin the most comfortable and efficient fin on the fitness market.
 
Features include:

• Split blades of the fin act like propellers, twisting independently during each stroke for increased lift and thrust
• Comfortable, easily adjustable foot pocket with padded neoprene strap
• Significantly reduces ankle and joint fatigue
  
• Easy adjust buckle system
• Non slip sole
  
• Four sizes: XS thru L
• Color: Blk/Blue & Blue/Blk