Low-profile backrest supports the lower back and spine. Softly curved upper edges reduce stress on pressure points by gradually tapering away from user. Unique center channel averts pressure on spine. Helps to maintain the spine's natural S-shaped curve. Contoured Therasoft® material keeps its shape. Nonabrasive, antistatic, washable. Provides maximum support to the “small of back” region. Elastic strap fits any chair.