Vitra.

With knitted coverings, chair parts can be upholstered seamlessly and in a form-fitting manner. The expandability and elasticity of these materials assure a high degree of seating comfort. Various colours can be incorporated and different functional characteristics achieved by varying the density, something that would not be possible with woven fabrics. For instance, the armrests and seat shells of the new Worknest office chair are covered with knitted fabric yet their functions are fully retained thanks to this material's expandability.