Purchase The Original McKenzie D-Section Lumbar Roll: Posture support device for treating back pain. Rests flat against chair backs Extra Support: This lumbar support is best-suited for larger individuals, or those that require a greater amount of back support. D-shaped designed rests flat against chair backs. Made in USA or Imported Mckenzie Lumbar Cushions OPTP The Original McKenzie D-Section Lumbar Roll – USA-Made McKenzie Lumbar Roll The Original McKenzie D-Section Lumbar Roll is designed to provide firm and reliable lumbar support while sitting in almost any chair. Its unique D-shaped design rests flat against chair backs, making it ideal for those who prefer a higher level of support or have a larger lumbar lordosis Improves posture and helps correct mechanical back pain. OPTP The Original McKenzie D-Section Lumbar Roll – USA-Made Low Back Lumbar Support for Office, Car Seats and Travel. The Original McKenzie Lumbar Roll by OPTP – Low Back Lumbar Support for Office Chair & Car Seat Back Support Cushion. The Preferred Lumbar Pillow by Physical Therapists - Standard Density Measures approximately 11”L x 4., 25”D x 5., 5”H.