SkiL-Care Lateral Stabilizer Armrest Bolsters are covered cylindrical foam cushions that can be mounted to most armrests to reduce unwanted lateral leaning and provide posture support. Use the 5" diameter for most patients, the 6" diameter for heavier patients. Secures to wheelchair armrest with full length hook-and-loop attachment. Sold individually, use of two bolsters is recommended for full lateral support. Bolsters may also be applied to the vertical bar of the backrest for more lateral support. Latex-free. Polyester and Sheepskin Covers: launder and dry at temperatures up to 180 F. Nylon Covers: spray with cleaner and wipe with a damp sponge or cloth. Do not bleach.