The seat starts wide, maximizing space within the official measurements for a shell chair, providing ample space for resting legs and ensuring comfort. As it connects with the back, it narrows, almost forming a waist to the chair. The sculptural curves of the chair are designed to follow the body, ensuring comfort during extended periods of sitting, while an elastic backrest adds extra comfort when leaning back.
The seat comes in three variations: with a polypropylene seat, upholstery and soft upholstery, allowing for different expressions to complement the surrounding environment. Langue is offered with steel legs in black or brass, adding a sense of lightness and airiness to the chair. It can stack up to nine chairs with a plastic seat and up to four chairs with a regular upholstered seat.