The sofas manufacturer and armchairs furniture of the Air Lounge System are in moulded cold-cure flexible polyurethane foam. The padding completely incorporates the supporting design structure, which is made of electro-welded steel plate; the suspension in the seating consists of elastic straps fixed to the basic structure. The unusual ring shape of this model makes the sewing and fitting of the upholstery especially difficult - so much so that the skill with which it has been accomplished is clearly evident even to non-expert eyes. The elements of this series may be upholstered either in leather or design fabric, with the possibility of combining different colours and materials.