Pro-fitness Source Speed jump rope with bearings for cardio traning and cross-fit Latest style Great Boxing and CrossFit Speed Workout Top Rated Exercise for Weight-Loss and Heart Health Pro-fitness Source Speed Rope is suited for Both Adults and Kids This Jumping Rope is Made from Durable Nylon which has good quality This is a great rope to take when traveling or take to the gym as it fits easily into your bag without taking up space or kinking up.