The double under is much easier to accomplish and master if you start out with the right rope! Speed ropes are best put to work once you have been able to string 20+ double unders together. Until then – consider one of these training ropes. Personally, I’ve purchased close to a dozen ropes, and these 2 are my favorite. Both are under $15, adjustable and with smooth ball bearing operation. try one and let me know what you think!