The Postura Plus Chair Size 1 features lower back area ventilation and superior comfort, gas injected legs for superior durability and less weight, built in glide, anti-tip design, anti-static stays cleaner and looks better, dual sitting position for better circulation & longer student concentration. Ideal for any conference or hosting venue. The KI Postura chair is strong, durable and light – virtually indestructible – chairs are made to last and comply with BS EN1729 standard parts 1 & 2 for dimensions, strength and stability. They are 100% recyclable and very easy to clean.