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. Versitile 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. Great for adding 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