The Back form is a contoured lower back support with supportive flanks, which hugs and supports the lower back. This form-fitting design contours to the back providing lumbar support for natural spinal alignment and improved posture. It features tapered back corners to adjust to the curved seating in cars. The Back form is a snug support for the lower back. Supportive flanks and tapered back corners to compensate for curved bucket-type seats. Has elastic straps for use on office chairs. A perfect all-round back support that you can take with you wherever you go.