SPRI PRX-R Pumping Rubber Workout Kit Strengthen, tone and sculpt all major muscles with this comprehensive kit Developed for convenient, time-efficient workouts Learn warm-up activities, resistance and abdominal exercises, and cool-down stretches Great conditioning for recreational activities and for increased overall mobility Includes 3 Xertubes of Varied Resistance, Door Attachment, and 30 Min. Pumping Rubber instructional video