DMI Seat and Chair Cushion for Office Chairs, Wheelchairs, Scooters, Kitchen Chairs or Car Seats, FSA HSA Eligible, for Support and Height while Reducing Stress on Back, Tailbone or Sciatica. Supportive high-density handicap accessories for daily living that works as a cushion for wheelchair seat or fsa seat cushion—great for long rides, flights, or office use.