Patented Slastix™ technology is revolutionizing the way you workout with resistance tubing. Slastix™ Toners are better than traditional "NAKED" tubing for increased safety and comfort. The tubing is protected from wear, nicks and cuts, as well as from the tubing being over stretched. Build strength and long lean muscle with revolutionary Slastix™ technology. Available in various resistances to accommodate all fitness levels.