18"W • 8" side panels are foam-padded! SkiL-Care® Side-Kick is an accessory specially designed for use with any foortrest extender to prevent the user's feet from falling off the sides of the unit. Attaches to the base of the footrest extender with hook-and-loop fasteners Extender cushions sit right on top. Side-Kick side cushions are approximately Works with any manufacturer's footrest extender. Footrest extender sold separately.