What's the difference? Why get an elastic version if you own one of the non-elastic products?
The BackRx® ($60) works as an augumentative support for existing seat backs, for example, in airlines and cars or on your sofa at home. In short, any time you are reaching for a pillow to stuff behind your low back, the BackRx® is a better solution. Think of the BackRx® as your travel partner so you can leave your adjustable support at the computer at work or home.
The BackRx® provides a great assist in the canoe or on the stands by multiplying the effect of the muscles that work for good posture. While both the elastic and non-elastic versions stimulate the core muscles to keep good posture, the BackRx®additionally recruits the hip flexors to help stabilize the pelvis while sitting.
For those whose occupation requires leaning forward--dental hygienists, manicurists--the BackRx® provides the additional benefit of following you when you lean forward or back. It also easily retracts to conveniently stay in place on your back when you are up-and-down.
Finally, if you have automatic transmission, you can safely drive with the BackRx® by slipping your right leg out of the loop. The leg is free to operate the gas and brake while the back support is maintained by the left leg.
Accessory Foot Straps
Sometimes one's occupation requires extending one leg slightly to operate pedals--think dentists, transcriptionists, pianists---adjustable foot straps ($17) are available that snap onto the buckle inside the knee. These will keep the elastic bands from slipping off the knee and retracting. WARNING: Foot Straps are not intended or suitable for driving nor for operation of any moving machine or vehicle. Also, any task where significant extension of the leg is required will render them ineffective.