FNS1469 Features: * Monofin * Single blade design promotes the development of the undulating foil body motion and propulsive dolphin kick * Promotes an equal use of down and up kicks for propulsion throughout the entire dolphin kick movement by teaching the foil technique and increasing the swimmer"s core and leg strength * Rubber blade allows multiple swimmers to safely swim in a single lane * Open toe and heel design fits a wide range of foot sizes, allows for a secure fit * Developed using Zoomers design principles and materials * Large surface area works core and leg muscles more than standard fins * For added comfort or minor size adjustments use with Skin Socks or Footbooties * X Small: 2" H x 14" W x 16" D, 2.1 lbs * Small: 2" H x 15" W x 17" D, 2.2 lbs * Medium: 2" H x 16" W x 19" D, 2.3 lbs * Large: 2" H x 16" W x 19" D, 2.7 lbs * X Large: 3" H x 17" W x 19" D, 2.9 lbs Construction: * Portable, lightweight construction is comfortable to wear for all ages and abilities