XYLsports Jump Rope Adjustable for Fitness Boxing Double Unders Workout 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. 10 ft easy adjustable rope, 5.7 in comfortable grips, 4 oz weight. 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 will give you a full refund. If our product is broken for whatever reason, we will send a replacement to you.