The Stroops Slastix Resistance Toner is the safest, most durable exercise cable available with its safety sleeve technology. The covered tubing prevents wear on the cable and over-stretching that can lead to injury, while also preventing irritation from the latex-base tubes. Slastix Toners are perfect for muscle toning and strengthening, developing cardio power, as well as improving muscle and joint rehabilitation. � Double the lifespan of traditional cables as a result of wear prevention from protective sleeve� Great for high-use areas, such as gyms or clinics� Comes in 4� and 6� lengths at 5 different resistances