The Lightn Pro cushion is the most advanced lumbar cushion to date. It's the first vertically adjustable and horizontally articulating chair cushion. The scientifically crafted memory foam and adjustable structure give you uncompromising lumbar support. The cushion has been crafted to cradle your L2 to L5 vertebrae for a more ergonomic seating position, so you'll feel more energized by the end of your day. The customizable vertical alignment gives you seating that's perfect for you and the horizontal articulation moves with you, so you don't feel constrained to one position through your day. Your chair has never been this comfy.