Featuring a harness system designed by Deuter the World's leader in professional hiking equipment. The specially designed and patented Aircomfort System from Deuter keeps a layer of air between the operator and machine. Designed for performance, superior operator comfort, and increased productivity. Super quiet units eliminate the need for multiple machines for different surfaces. Carpet, hard floors, upholstery, and above head cleaning become a breeze to clean. CRI Gold Seal of Approval.