UpSpring Baby Shrinkx Hips Ultra Postpartum Hip Compression Belt and Hip Trainer COMPRESSION BELT SHRINKS HIPS. Designed with multiple levels of compression, Shrinkx Hips allows you to control the amount of pressure on your hips & work towards slimmer hips. You should purchase the hip binder size that is closest to your pre-pregnancy pant size (pant size 0-8 is a XS/S and pant size 10-1X is a M/L). COMFORTABLE AND SOFT hip trainer belt that is easily worn under or over your clothing. Made of soft Nylon & Spandex materials. PHYSICIAN AND MOM RECOMMENDED. Wear Shrinkx hip trainer for women 6 - 8 hours a day, and then remove the belt at bedtime. MUST BE WORN IN THE FIRST 8 WEEKS postpartum to be effective. Do not wear Shrinkx hip compression belt until all staples or stitches have been removed and you feel you have recovered from the delivery itself. If you feel any pain when wearing the belt, discontinue use until you can wear it again without any discomfort. DO NOT wear Shrinkx Hips while you are pregnant as it is meant for postpartum support and recovery. 80% Nylon, 20% Spandex. PACKAGING MAY VARY.