•Patented split-fin propeller technology — 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. •Extended soleplate acts like a lever to enhance power stroke. •Extra-wide foot pocket is ideal for wearing with a dry or semi-dry suit — also very comfortable to wear with standard warm-water boots. •Quick-connect swivel buckles. Spring-Heel Straps also available separately. •Moulded from a stiff compound to deliver a slightly negative buoyancy.