HIGH RESISTANCE LEVEL: Our highest level of resistance fins for strength building or slower tempo aquatic exercises. These are our Highest Resistance level fins shipped as a pair DESIGNED FOR A LONG LIFE: All wear components are replaceable and have been upgraded for increased performance and utility. Versatile aquatic exercise equipment SECURE & BALANCED FIT: New design allows fin adjustment for larger ankles and tab locking for smaller ankles/wrist. See secure fitment video on listing IMPROVE SWIM SPEED & EFFICIENCY: Fins can be worn for efficient resistance/drag swim training. No cords to get tangled with and nothing on your feet. Resistance training for swimmers LOWER & UPPER BODY APPLICATIONS: Aquatic Fins can also be worn on wrist/forearm for upper-body resistance. Additional upper body resistance when used in conjunction with the bells or hands-free use when traveling or needing to pack light QUICK START GUIDE: The included guide allows you to unpack, wrap them on and jump in the pool. More training resources and free training videos available online MADE IN USA: Made in USA of U.S. and imported parts. Water weights for pool exercise and water aerobics equipment Aqualogix High Resistance Hybrid Fins Pair - Blue (6" Blades) - The High Resistance Hybrid Fin is the newest addition to our line of functional aquatic resistance equipment. The high resistance Fins are superior in high intensity lower body water exercises. You achieve results with high tempo water exercises, dynamic neuromuscular training, athletic performance training, rehabilitation and injury recovery pool training. Also a great tool for combining resistance and drag to your swim training.