I Pure Ion Knee Wrap,Black iPure perfomrance wraps are desinged to insulate muscles and increase blood cirulation around joints. iPure technolgoy is a negative ion generator thought to encourage the body to find its blanace state needed for optimal performance. Ion Technogology may be associated with energy, strength, balance, endurance, flexibility 5.5-Inch Width x 1.5-Inch Diameter x 8-Inch Height