|Unlike the typical educational seating of past generations, all I.Q. chairs and chair desks feature a gentle lumbar curve to more effectively support the lower back. In additon, the concave shape of the I.Q. seat more fully conforms to the human body's natural contours. With a waterfall front that's easier on your legs and an extra-wide design that accommodates a wider range of movement in the chair - a particularly important point when it comes to irrepressibly active younger students - I.Q. delivers sustained seating comfort.