New heart-pounding "Ropes Gone Wild" power conditioning ropes provide a low impact high cardio workout through various easy drills. Created by John Brookfield and his "battling ropes"® program, this system allows you to whip large diameter ropes into unlimited wave motions which amp up the heart and burn large muscle carbs. Pick the length of rope to the size of your space and the progression of workout. The 50' rope can be doubled up for 2 ea 25' sides. Polypropylene rope looks and feels like natural fiber plus is stronger, lighter and not affected by moisture. 1 1/2" thick. Made in the USA.