Best cardio workout, promotes the greatest amount of weight loss in the healthiest manner possible. Effective in building endurance, stamina and speed. The handles are very comfortable, they are custom molded to minimize hand fatigue. The handles come with a super-speed ball-bearings that ensure smooth, effortless and even rotation. It's great quality, built to withstand heavy use. The rope is made with a nylon rope assembly, very easy to use and works great on different surfaces.