AquaLogix Blue Max Resistance Aquatic Fins - Omni-Directional Water/Drag Resistance Exercise for Lower and Upper Body Pool Workouts - Includes Online Demonstration Video (Fins Pair HRBBLS) (4) 6" Blades attach to ankle or wrist; sold as Pair High intensity, low impact vertical aquatic training for all fitness levels Most effective when used in conjunction with the upper body Aqua Bells Omin-directional drag resistance training Most effectve for lower body and core specific water training Blue Fins provide more resistance than the Green Fin version Regain your range of motion and strength without &#034;over doing it&#034; Avoid joint stiffness and minimize the build-up of scar tissue, getting you back in the game Rather than immobilization, reconditioning and the reintroduction of many movements can begin sooner Infinite degrees of recovery variability in not only resistance, but movement patterns as well Return to readiness weeks or even months faster than land based rehabilatation Dynamic omni-directional rotational force of multi-planned stretching and strengthing, teaches the body to store elastic energy Unparalleled effectiveness in the establishment of sport relevant strength potential Train at the highest intensity while keeping the impact to a minimum, yielding faster recovery from your last heavy workout - Eliminate delayed onset muscle soreness Training key muscle and joint actions that effect sports specific movement, thus enabeling dramatic improvements in speed, quickness, power &amp; sports specific skills