Hight Quality - Goonidy jump rope is made of steel wires that are coated with strong PVC material, eliminates tangling and coiling, making it durable even after a long time exercising, can be used indoors and outdoors. The ergonomic handles are covered with soft memory sponges, which makes them comfortable to hold. And the non-slip & moisture-wicking features also keep your palms dry to prevent the handle from coming off, making your every exercise comfortable and safe. Speed Rope - Builted-in dual high-quality professional ball bearings, ensuring smooth spinning long time. This skipping rope can support fast jumps smoothly and freely without the exercise ropes getting tangled and twisted. It gives you more control and also reduces the chance for you to trip over. As Goonidy skipping rope can bear heavy load, which brings your a perfect exercise of skipping rope, also provides the best fluency for elite fitness professionals. Weighted Jump Rope - The handle is equipped with a detachable iron block that weighs 0.7 pounds when inserted, which allows for strength training. The exercise efficiency of heavy jump rope is 5 times more than ordinary skipping rope. It can build your core, shoulders and back muscles, and improve your strengths in a short time jump rope workout. With a weighted jump rope, you can easily achieve your exercise goals at home or at the office, rather than cost more time and money in the gym.