XYLsports Jump Rope Adjustable for Fitness Boxing Double Unders Exercise Best aerobic exercises for burning a lot of Calorie, slimming down, improving flexibility, developing core strength and good for heart. Appropriate for all ages, lower-impact activity than jogging. 9'8" Easy Adjustable Rope, Comforable Foam Grips Swing smoothly with less effort, uncoil easily and resist tangling. Premium quality, durable jump rope, exclusive designed for fitness and sports lovers. 100% Money Back Guarantee and Lifetime Warranty - If you aren't satisfied with our product, just let me know, we'll give you a full refund.