The Back-N-Shape II is a low back orthosis designed to provide support for lower back sprains and strains or disabilities through compression. This low-profile orthosis can be worn under clothing and features elastic material that provides uniform compression and support. This support includes double sided pulls for additional support. OPTIONS: Thermoplastic insert that can be molded to each individual for customized support. Also available is a contoured design fit for female users. SIZES: Small, medium, large, extra-large, and extra extra-large. DIMENSIONS: Small fits waists 27 to 31 inches, medium fits waists 31 to 36 inches, large fits waists 36 to 41 inches, extra-large fits waists 41 to 46 inches, and extra extra-large fits waists 46 to 51 inches.