Lower back support pillow
A lower back support pillow helps provide support for the inward curve in the lumbar spine. Sitting for extended periods of time without any lower back support can create muscle tension and pain in the lower back and legs (e.g. sciatica). Used when in a seated position, a lumbar support pillow fills the natural gap that is created between the lower spine and the chair.
Lumbar back support is also helpful when sitting in a car. When the lumbar curve is supported, the downward forces of gravity and driving are absorbed much like a coiled spring, as opposed to a non-supported straight or slouched lumbar spine.