The J3 Carbon back is flexible and comfortable, while enhancing the stability you need for a very active lifestyle. Lightweight and strong, it offers the same strength as aluminium but is 60% lighter. There are four back heights available for active users with low to moderate posterior trunk support requirements. A “fixed” or “quick release” mounting option is available to suit either rigid or folding frames. The 2-point mounting options offer easy to handle angle, depth, width and height adjustment. The optional Accessory Bag offers convenient storage and neatly covers the backrest | cushion gap.