The Tone Fitness speed jump rope can help improve cardio endurance, develop strength and core as well as shape and tone your entire body. Made with contour foam handles, precision ball bearing rotation and adjustable rope length, the speed rope is compact and portable. Get a quick workout at the gym, park, home or anywhere on the go. Jumping rope is one of the most effective methods of cardio training. An effective and economical tool for any fitness program. Warning: This product contains one or more phthalate chemicals known to the state of California to cause birth defects and other reproductive harm. Consumer may return the product for a full refund, including shipping cost for both receipt and return of the product within 15 days of his or her receipt.