Soft laptop cushion attaches to the wheelchair. The cushion does three jobs: it's a soft, snug upper body positioner; a comfortable support for elbows; and a semi-firm surface for eating and activities. The Hugger is notched to accommodate almost any wheelchair with full-length armrests that are 14" - 19" apart. Blue vinyl cover with zipper wipes clean. Does not fit Invacare® IVC wheelchairs.