Sweat in Style Fitness' Toning Ring 2-pack brings flexible, resistance-based challenge to almost any exercise while doubling as physical cues in maintaining proper form. Made from weighted and flexible springs, use individually or as a pair to work the upper- and lower-body or to challenge both in bilateral workouts. Try placing between the ankles or thighs during Hundreds to work the inner-thighs and pelvic floor while deepening your abdominal challenge. Create long lean arms by using in place of a roll-up bar during isometric arm exercises. Includes a downloadable Exercise Guide.