Drivers who spend a lot of time behind the wheel know the importance of proper support. Even cars with well-designed seats and lumbar support can be taxing on your lower back at times. The Sacro-Ease Wedge is designed to bring your hips and thighs to a neutral position, relieving pressure on your lower back and spinal discs; it includes a removable insert designed to support your tailbone. It's not just for driving, either -- the Sacro-Ease Wedge works just as well in your office chair or home. Measures 16"L x 15"W x 3"H.