Alison is a seating system designed in 2006, and now in its Iroko or Dark Brown finish versions are designed specifically for use in areas that are exposed to the elements, either indoor or outdoor. The sleek design of the sofa and chaise, with its simple squared-off lines, finds its ultimate expression in the choice of Iroko Heartwood for its exposed frame. A new, exclusive collection of exterior fabrics, available in sophisticated colors and textures, lends a crisp, lively note to the Alison outdoor sofas and chaise lounges. The furniture frames rest on stainless steel tips set into slots in the wood. This technique eliminates direct contact between the wood and the outdoor surface as a safeguard against damage due to humidity. Cushions are of high-density polyurethene foam with a synthetic fabric cover. All the cushions are encased in a waterproof polyester lining with traditional stitching. As well as all the accessories used in their manufacture - zippers, thread - are waterproof and therefore suited for outdoor use.