FDW 1.5" Poly Dacron Strength Training Undulation Battle Rope Fitness Exercise 40Ft Rope Size Optional: 1.5" Diam. x 40 Material: Black nylon with ends capped in durable composite coating to prevent fraying. 600D Oxford Waterproof Sleeve Protect the Rope from Friction and Fray High Tensile Strength,High Quality Battle Fitness Rope Perfect for cardio training, improving your endurance of shoulders, back, arms, increasing reaction time and metabolic rate. Perfect for boxers, wrestling mixed martial artists, swimmers, surfers, basketball, baseball, tennis players, or anyone looking forward to promoting their physical fitness to a new level