SPEEDSTER Rocket Single Overspeed Trainer MEDIUM RESISTANCE 30' COVERED CORD WITH PADDED SHOULDER HARNESS AND WAIST BELT 30ft Medium Resistance Bungee with Shoulder Harness & Padded Waist Belt. Features Safety Sleeve TechnologyTM to protect tubing from damage and overstretching. Lightning Cords can last 10x's longer than uncovered tubes. Incredible Safety - Our Safety Sleeve protects athletes from potential injury. If you or your organization provide or use tubing, you could be liable Speedster Training Products are used by athletes, coaches, organizations and teams worldwide. Made in USA. 1 year conditional warranty.