The Deuter patented aircomfort system engineered for comfort and productivity. Lightweight breathable mesh back panel allows cooling air to get to the users back, keeping the operator up to 25% cooler. The premium model takes it to the next level with a patent pending "AC" system that pulls warm air away from the operator, keeping the user even cooler and more comfortable. Heavily padded waist belt and lumbar support with ergonomic pull forward tightening straps transfer weight to the user's hips, not shoulders. Cord length/type: 50 ft/ direct plug. Filtration: 4 stage HEPA; Waterlift: 110"; CFM: 130. Vacuum motor: 1100W; Power: 120V.