Core International, Inc.
The Original Mckenzie Lumbar Roll. Provides Lower Back Pain Relief And Reduces Pressure In The Discs Of The Lumbar Spine. Adjustable, Removable Elastic Strap Lets Users Secure The Roll To Standard Chair Backs And Auto Seats, And Lets Patients Attach And Wear The Roll Around The Waist. Can Be Used At A Desk, In The Car And At Home To Ensure Proper Posture Throughout The Day. Mckenzie Superroll Provides Lumbar Support With Less Bulk, And Features Velcro And A Plush, Soft Polartek Velour Cover. Mckenzie Superroll
and I've had several. This one is somewhat firm but holds it's shape over time. My first one was bought in 1995 and it's still in good condition!
Might not fit with all car seats (where I use it)but it's better than no lumbar support.