The Monster Walk uses progressive variable resistance to restrict you from using momentum. As a result, you will strengthen lower body and core muscles at their weakest point, increasing your overall speed and agility and reaction time. The Monster Walk is also a great way to warm up muscles to help reduce the chance of injury. Product Information: Resists lateral movements Soft ankle cuffs grip comfortably, even when doing high-knees A staple ingredient in any speed training program One 30 inch cable ring Two soft ankle cushions One instructional DVD with brochure by fitness expert Jon Hinds SPECIFICATION: Brand Jordan Usage Home Use, Commercial Use Condition Brand New Warranty 12 Month Warranty