CrissCross Belt with Mold-In-Place Back Support Semirigid, moldable insert firmly supports back and is held in place with wide elastic lumbosacral belt. Overlapping abdominal straps; contoured front, soft plush fabric lining. One insert fits all size belts. Use CrissCross Belt with or without moldable insert (sold separately). Belt alone comfortably supports lower back. Heat insert on hot plate or in hot water.