NadaChair SportBacker is a unique Portable Sitting Support. Those who suffer back pain from slouching on canoe seats, fishing boat seats, camping chairs, stadium seats or in tree stands hunting are guaranteed instant back pain relief from Nada-Chair's lower back supports. Use as a meditation tool for improving posture while sitting cross-legged for yoga. The Sport backer is a middle-of-the-line back sling, and is approximately half the size of our deluxe BackUp. It targets the low back more narrowly with a back pad that is six inches high. For those of small or medium body build, the SportBacker provides an optimum balance between comfort and function. The SportBacker is small enough to fit in any journey bag so it can be used for long flights instead of the pillows provided by the airlines. Persons with a larger frame or requiring more comfort for prolonged sitting should consider our BackUp Nada Chair. There's no need to be victimized by poorly designed chairs at work, at home or while traveling. Any time you wish, you can upgrade your SportBacker with accessory Cushins ($10) and Stretch Straps ($10) that come standard with our top-of-the-line BackUp.