The SPRI Superbands are thick, extra strong and ideal for heavy use. Superbands are designed to work lower leg muscles, provide resistance for walks, shuffles and lunges and help to prevent and rehabilitate sprained ankles. They are also perfect for power assisted pull-ups/chin-ups, as well as in all crossfit activities to provide added resistance to your workout. Superbands allow the user to customize and create a level of resistance that fits their strength level by controlling the tension in the resistance by shortening or lengthening the band. Superbands are extremely lightweight and perfect for staying fit while traveling allowing you to train anytime and anywhere. Bands are 40” long and 3/16” thick and are available in 4 different widths (½”, 1”, 1¾”, 2½”) ½” Superband offers 25 lbs of resistance 1" Superband offers 50 lbs of resistance 1¾” Superband offers 75 lbs of resistance 2½” Superband offers 100 lbs of resistance About SPRI SPRI Products, Inc. is the leading manufacturer and distributor of rubberized resistance exercise products for the health and fitness industry. SPRI designs and produces innovative rubber resistance exercise products and has led the way in popularizing rubberized resistance workouts. As the pioneer of this simple, but effective method of strength training, toning and building lean muscle tissue, SPRI has remained on the cutting edge of today"s exercise trends. SPRI continues to expand into related markets as new applications are discovered and professional and consumer interest builds. As the fitness industry continues to evolve and move toward convenience and affordability, SPRI’s line of products has grown to include educational materials, instructional manuals and videos, fitness equipment and accessories.