Item Type: Yoga Ring Material: PP+EVA+ Foam + Glass Fiber Diameter: Approx. 37cm/14.6in Handle Width: Approx. 5.3cm/2.1in (Manual measurement, allowing error within 1cm) Purpose: Yoga buttocks circle Function: Yoga supplies Package List 1 x Yoga Rin 1The highstrength glass fiber material has impact resistance and corrosion resistance. 2Help to tone and strengthen various muscles, including arms, chest, abdominal muscles, legs and gluteal muscles. 3The soft material and foamfilled handle design provide support and comfort. The shape of the curved handle prevents slipping and helps balance exercise. 4Can help you easily integrate into your daily fitness, very easy to use, and maintain a healthy body shape. 5It can especially help you train your hips, especially suitable for people who are dissatisfied with the hip curve.