Slimming Belly Wrap Increase Circulation Raise Metabolism Slims Belly & Waist Adjustable Compression Lower Back Support OBGYN Recommended Made with Love, Backed by Science Fabric: 40% polyester, 24% rubber, 6% rayon, 4% nylon and 16% bamboo charcoal yarn (inner). Bamboo Charcoal Benefits Bamboo charcoal fiber, one of the latest breakthroughs in natural health, naturally emits far infrared light which interacts with your body heat. This helps to increase blood flow and metabolism, reduce swelling, and speed healing. Shrinkx Belly Bamboo Charcoal Wrap combines cutting edge bamboo charcoal fiber technology with triple-point compression to help you lose inches, shrink your uterus and slim your figure. This adjustable compression and therapeutic bamboo charcoal fiber work together to increase circulation and speed recovery. Sizing Chart Small-MediumBelly Measuring 25" - 43" Large-XLargeBelly Measuring 44" - 52" Before delivery measure belly circumference then subtract 3-5 inches to determined sizing. After delivery use current belly measurements.