Comie Poly Dacron 30ft/40ft/50ft Length Battle Rope Exercise Workout Strength Training Undulation Material: 100% Poly Dacron, Wear Resistant and Durable,3-Strand Twisted Rope Strong Construction. Easy to use: Just wrap it around something (tree, post, pole) and then get it start. 600D Oxford waterproof sleeve protect the rope from friction and fray, more durable and will last many years of usage. Mix in short bursts of max heart rate training rope for exercise and not only will you build the muscles in your shoulders, biceps and core but youll also burn fat around the muscles too. You dont always have 3 hours to kill at the gym so make the most of your time by getting in a quick yet efficient fitness rope Total Body Workout that will impact all major muscles together. Throw the exercise ropes in a backpack and ride your bike around with them. Perfect for indoor or outdoor core training whatever the weather. 600D Oxford waterproof sleeve Protect the Rope from Friction and Fray Yellow Tracking Line, Convenient for Maintenance 3-Strand Twisted PolyDac Strong Construction Heat Shrink Caps on the ends High Tensile Strength Build Stamina &amp; Burn Fat Increase VO2 Levels Improve Cardiovascular Health Gain Lean Muscle Mass Strengthen Core Muscles Color: Black 100% Poly Dacron, Wear Resistant and Durable Easy to Grip: heat shrink cap ends help keep its shape Durable &amp; Wear-resistant: made of premium nylon Optional: available in varied rope length and diameter for fitness levels. Practical: for abs, arm &amp; core strengthening, coordinating and shape building Widely applicable: for crossfit, fitness training, athlete, boxer and sport-lover Versatile: used as battle rope, fitness rope, undulation rope and power training rope Clean: main black color design helps make dirt less visible Easy Maintenance: recognizable yellow tracking line for strength adjusting