Pilates Circle Ring Dual Grip - Toning, Premium Exercise Resistant Thigh Ring Core Training Core workout, abdominal, thigh, leg and arm toning. Strengthens posture and mobility. Great for upper thigh exercisers for women. This helps improves muscle tone of the upper inner and outer thighs, arms, lower body, upper body and core. Increases the effectiveness of Pilates training. Ideal for all fitness levels Spring steel ring built to withstand continuous, high-intensity studio use