The patented Smart Toner promotes consistent and explosive movements to improve golf performance. The Smart Toner features a revolutionary flexible sleeve designed to protect the tubing core from premature breakdown and wear to provide maximum safety and comfort. Durable and made from the highest quality materials, the Smart Toner lasts longer than traditional tubing and holds up against the most rigorous training conditions. Perform a variety of high performance exercises comfortably without the irritation of latex against skin. The Smart Toner is available in Light, Medium and Heavy resistances. The bonus door attachment provides the option to use the Smart Toner from multiple anchor points with ease in any door frame.