Sicla is a rigid “bucket” chair, made of a comfortable lightweight and thin shell. To provide strenght and stability, the edges along the shell have been curved. To avoid the “hollow” sensation of the shape a rib was inserted around the back of the chair, leading out into the armrest. This provides a lot of stability to the rest of the shell, supporting the slim and slight expression. As an added bonus, the rib provides a good grip on the armrest when lifting the chair.