.04 is an office chair by Maarten Van Severen for Vitra. Made in flexible backrest with integrated leaf springs. Polyurethane integral foam seat shell with upholstered effect, self-supporting on a steel frame. With armrests in integral foam..04 is an office chair that looks very different from typical work chairs used in traditional offices. However, it offers advantageous ergonomic features: the chair's flexible integral foam shell provides a pleasant seating surface and nicely flexible backrest, while the micro-mechanism with rubber ball joint allows for gentle multidirectional movement. With its discrete design, the .04 work chair is ideal for study spaces and home offices.In this version with 03 soft casters for hard floors.