With safety being a top priority, HO have added some key safety features to their new tube rope offerings that only add to the fun. The neoprene core allows the rope to float atop the water for better visibility and less chance for hang-ups on unseen objects that may be in the water. In addition, the can be easily seen with a reflective fleck in the rope weave. The 4k Tube Rope is a 60 foot long rope designed for 3-4 riders.