Scubapro Twin Jet Scuba Diving Fins - Limited Edition - Pink - (Medium) Patented split-fin propeller technology has been proven to deliver more forward motion with considerably less effort than traditional blades Drag-reducing vents substantially decrease resistance on both up and down strokes Soft, vented foot pocket is bio-engineered for optimum fit and comfort while seamlessly transferring energy from the diver to the fin Quick-connect swivel buckles with quick-adjust straps facilitate adjustment and use Limited Lifetime Warranty including buckles and straps.