The Sine Lounge Chair is an outdoor armchair designed by Note Design Studio for NINE. It is part of the Sine collection, which consists of several modern outdoor furniture made of quality stainless steel. The series is built to last and therefore has a strong resistance to rust for long-lasting performance and lasting quality. The name comes from the fluid sweep of the mathematical sine wave. The outdoor furniture is made from a single continuous line of sturdy stainless steel sheets that are simply draped over the frame. The outdoor armchair has a cantilever base which is inspired by classic Swedish furniture and which gives a light bounce when you sit on it. This, in combination with the curved seat and backrest, means that the armchair has a high level of comfort.