FELLOWES Standard Back Support, 13 x 4 x 12, Black - 91905Features Back support provides maximum comfort and proper support. High density foam keeps its shape. Adjustable strap hold cushion in place. Removable cover. Attach this backrest cushion to an office chair to achieve comfort while sitting for extended periods. Support the entire back with this high density foam cushion. Attach this backrest cushion to an office chair to achieve comfort while sitting for extended periods. Supports the entire back. The