Achieve dynamic leaps and strong springing power by incorporating the Lifeline PER4M Jump Trainer into your workout regimen. The durable Latex® tube construction enables long-lasting use, and the quick-release power tubes can be easily added on or taken off, so you can add resistance to drills and training workouts. Padded adjustable belt and ankle straps for customized comfort. Includes 10 drill cards. Lifeline PER4M Jump Trainer Black - Hand Exer. Equip. at Academy Sports