S23 Accessory Chairs Our patented vertical leg design, now uses a rounded 23mm square leg design to make it easier to use than ever before. S23 improves the stability and leg adjustment system, whilst also making the chair much easier to use with chair accessories. The mattress is made from the highest quality lightweight materials, providing improved breathability and comfort. FEATURES Unique patented vertical leg design Fully adjustable leg system with super stable S23 profile Deluxe padded mattress with central breathable panel. Made with 600D Korum fabric and breathable mesh panels Quick Fold lightweight frame design Swivelling Korum mudfoot for uneven terrain Standard: Features non-telescopic legs, at an improved height of 50cm. Telescopic S23 legs are available to order separately. Deluxe: The Deluxe model features a new reclining armrest system, where the armrest can be simply moved out of way on one or both sides. It also boasts a new telescopic leg system, for maximum adjustment.