Virco's Analogy mobile task chairs come with an ergonomically contoured polypropylene shell that flexes to accommodate different body types. The pneumatic seat adjustment and an adjustable foot ring make this model an excellent seating solution for use with computer tables in schools, offices and other learning environments. The seat shells feature a waterfall front edge to promote good circulation in the user’s popliteal arches, lower legs and feet. The chairs also provide excellent mid-back support and comfort to users of many sizes. The seat has contoured wrap-around flexible ribs, which are dynamically tuned to allow the upper back to flex more easily than the lower sections, a key to combining comfort and support.