The AAC 253 counterbalances the high functionality and modern expression of the five-legged castor base with the softness of the upholstered shell. Retaining the fundamental idea shared by the AAC family, this model is characterised by a curved shell with a slightly higher back. Designed with optimal functionality in mind, the shell construction offers a deep, generous seat that combines inviting aesthetics with a high level of comfort, whilst the lower armrests provide good support and enable the chair to fit underneath a table or desk. The base is designed with a gas lift that can adjust the seat height and is available in either polished or powder-coated aluminium, with the shell offered in a variety of regular and quilted upholstery options. The multitude of variants and design combinations give this series great versatility in a wide range of corporate, public, and private contexts.