HEAVY WEIGHT AND HIGH EFFICIENCY: Heavy jump rope is 5 times more effective than ordinary skipping rope for building your core, shoulders and back muscles,help you build strength in a short time jump rope workout.Its weight is 5-7 times that of the standard skipping rope.1in×9ft rope: about 0.85KG ; 1in×10ft rope: about 1.25KG DURABLE AND COMFORTABLE: The heavy skipping rope is made of durable polymer synthetic fiber, has high tensile strength, prevents breakage, and has a comfortable handle. It can burn calories and perform excellent skipping exercises without causing discomfort, it can be used indoors or outdoors, and its performance is reliable and long lasting, so you can focus on exercising. CONVENIENT AND EFFECTIVE: You can achieve the same strength training effect in the gym with a TONYKO heavy jump rope doing skipping exercise. Make your skipping rope heavier, easily achieve your goals at home or in the office, without spending a lot of time and money in the gym RECOMME