The weighted speed jump rope combines resistance and cardio training to develop upper body strength and physical endurance. Use a weighted jump rope to warm up muscles, for cross training double-unders, intense HIIT workouts and to improve coordination, agility, footwork and quickness. The Lifeline Weighted Speed Rope features .75 lb weight in the rope and high-tech ball bearings for smooth rotation to provide effective weighted jump rope training. DESIGN: Tone muscles while building stamina Build power for quickness and explosiveness Improve agility needed for peak athletic performance Easy-to-use sliding length adjusters High-tech ball bearings in handle for smooth rotation WARRANTY: Lifeline Fitness warrants that the products sold to be free of defects in materials and workmanship and to be in perfect working order at the time of purchase. If the product should, for any reason, become defective within 60 days of purchase, Lifeline will replace the product once it is returned to Lifeline. This warranty does not apply to any damage caused by accident, abuse or misuse of the product. There are no other warranties other than those expressly set forth within.