World One is an updated version of Niels Diffrient's renowned World chair, the most minimal, yet fully functional task chair ever made. Featuring the same innovative tri-panel mesh backrest and weight-sensitive recline as its predecessor, World One is a cost-effective solution that delivers highly engineered ergonomic support and the ultimate user-friendly sitting experience. Customized Fit Tri-panel, non-stretch mesh construction creates body-fitting contours and self-adjusting lumbar support for an automatic, customized fit. Supportive and Adjustable Provides appropriate support and automatic resistance regardless of user’s size. Size-adjustable to fit the widest range of body sizes. All Body Types Frame-less front edge eliminates contact stress behind the knee and designed for users up to 300 lbs.