Intellect Wave's task chair is built for comfort and ease. This simple ergonomically comfortable chair is available in two sizes with your choice of glides or casters. Medium task chair is all poly, armless only. Large task chair is either all poly or poly with upholstered seat - with or without arms; large chair is also available with tilt via an easy-to-use tension knob adjustment. Perfect for a multitude of applications, including classrooms and computer rooms.