Comfortable foam handles on the Slastix Toner. Patented Slastix technology is revolutionizing the resistance tubing industry. It is superior to traditional naked tubing because it provides increased comfort and safety. No longer will you have to worry about your skin being pinched or having your hair pulled. Safety Sleeve provides ultimate protection from irritation caused by latex. The life of the elastic increases dramatically since the elastic is protected from wear. Another benefit of Slastix technology is that the sleeve provides safety stretch limitation. The stretch limitation not only protects the user, but it also protects the elastic, thus doubling the life of the equipment.