Perfect for basketball, volleyball, track & field and all manner of athletic and resistance training, this tool maximizes your vertical and horizontal explosiveness by strengthening quads, hips and glutes—the muscles that contribute most to jumping and vertical leap. Increase lower body dynamic strength as a result of adding intensity and consistent positive and negative resistance to jumping, squatting and all manner of lower body drills and exercises. Comes with 10 instructional drill cards. DESIGN & INCLUDES: Build explosive power and jumping ability! PER4M Jump Trainer maximizes your vertical and horizontal explosiveness by strengthening quads, hips and glutes. Increase lower body dynamic strength by adding resistance to drills and training workouts KIT INCLUDES: Adjustable Padded Belt; (2) Adjustable Ankle Straps; (4) Quick Release Power Tubes; 10 Drill Cards; Backpack Carry bag Includes 10 instructional training drill cards The padded Adjustable Belt and Adjustable Ankle straps wont irritate skin during training; heavy duty padding and construction wont rip; adjust for a tight/secure fit Heavy duty construction means product last longer under intense training environments