Over the years, The Original McKenzie Lumbar Rolls have literally helped hundreds of thousands achieve freedom from common low back pain. An adjustable elastic strap lets users secure the roll to standard chair backs and auto seats. Proven quality! An independent laboratory compared the high quality McKenzie Lumbar Rolls, by OPTP, with competitive products and found "...the OPTP Lumbar Roll is more supportive, will not lose its supportive qualities as quickly, and will offer more consistent support longer than the other rolls sampled." An independent laboratory confirmed the superiority of The Original McKenzie Lumbar Roll in a blind random analysis with test rolls from our largest competitors. While the foam used in a competitor's lumbar roll suffered immediate and continued structural breakdown, OPTP's roll suffered no structural breakdown and remained consistent through the test period. The lab's conclusion: "...the OPTP lumbar roll is more supportive, will not lose its supportive qualities as quickly, and will offer more consistent support longer than the other rolls sampled..."