NXT MOV reinvents movement seating for tomorrow's classroom. Increase mobility with the NXT MOV Four Leg Caster Chair. The ground-breaking, patented design provides best in class comfort and style. The 2-part shell design enables the seat back to move independently from seat, allowing the body to move in many ways. Poly shell available in 16'' and 18'' seat heights. Choose a single color for seat and back, or mix-and-match.