Comfort From The Inside OutNucleus seating from HON delivers comfort from the inside out. The lean, sculptural seat conforms to everyone's unique support needs. The back flexes with the spine. Nucleus adapts to fit legs, shoulders and weight using easy-to-reach controls. The responsive synchro-tilt mechanism keeps the seat level and the chair stable as the back reclines, and locks in four positions.Sit Down. Stand OutKick your worn-out standard office chairs to the curb. Nucleus replaces outdated seating to keep you comfortable at work with an internal seat structure that’s formed by mesh. This task chair is available with either an upholstered or mesh back that flexes four ways to put instant lumbar support right where you need it.