Logic is an ergonomic, versatile and easy-to-use task chair series designed for longer periods of sitting. The functional ergonomics of the chairs is based on individual comfort, practical design and movement that allows active sitting. The key adjustments of the chairs have easy-to-use guide symbols and an air-pump-adjustable lumbar support comes as a standard feature. Long durability and sustainability are big part of new Logic task chairs due to the fact that every component is fully recyclable and free from toxic substance.