Thank you for viewing! Purchased from the official store. Used a few times. Washed. My posture improved and my back pain lessened, but I haven't used it, so I'm selling it! Product number: YS-BG-03A Size: 70-110 (waist circumference), regular size Materials: Belt body: Polyester, nylon, etc. Pulley part: Polyacetal I look forward to your purchase if you don't mind it being stored at home. #StyleLumber #PelvicBelt #Diet #Correction