Product Description Material: Fabric 【Gentle Fit, Solid Durability.】 The soft PVC spring material gently fits the waist, designed to be comfortable even with prolonged use. Reinforced ropes are used inside for reliable durability. Easy exercise in just a few minutes a day! Efficiently tightens the waist and abdomen with rotational movement. Furthermore, it supports training for the chest, legs, back, and other parts of the body. This one item will change your daily exercise routine. Convenient to Carry & Store: Easy to carry, fitness anytime, anywhere. Lightweight & compact design, can be twisted and folded freely. It doesn't take up much storage space and fits neatly in a suitcase. Exercise casually at home or while traveling. Second Generation: More comfortable, more secure. Evolved Soft Flap Hoop 【Skin-Friendly Integrated Molding Structure】 Cover design prevents friction and pinching, reducing the burden on the skin. Easy to clean, safe to use every day. Thickness: 3.3 Circumference: 180 (inside)