Dan & Theresa use this jump rope with their clients in the studio to add challenge & a great arm workout during their jump rope routines.  Having tried others, they have found this rope to be the most comfortable to hold, & the smoothest twirling rope on the market. The weight of the handles is adjustable & comes with (3) 1/3lb. weights for each handle that have been designed to fit together, to be used separately, or not at all, for maximum workout flexibility. "Dual-Corded" PVC rope - PVC wrapped around cotton cording to prevent stretching. Steel bearings provide a smooth, consistent swing motion and are highly durable. It comes in a 9ft length that can be shortened to fit anyone perfectly. It is a must for anyone wanting to add challenge to their jump rope routine!