Design and ergonomics. Materials and functionality. World-class. These are features that make Collection C into a modern classic. The task chair is based on the pioneering active sitting technology MartinStoll developed at the end of the seventies. And which is still unrivalled. Always popular. Always right. The way a classic should be. Collection C has all the design and technological features that are typical in MartinStoll chairs. At the core is the Synchro-Torsion-System (STS) which the company developed back in 1978. The key feature is active support for the pelvis. When sitting upright, the pelvis is kept in a steady position without the user even realising this. The wedge-shaped seat prevents the pelvis from slumping backward and keeps the back in an optimal position. When users lean back, the rear seat section is angled downward to give a constant and supportive contact with the backrest. Choose between different types of task chairs and combine with visitor chairs for an appealing total solution.