This J.Burrows Memory Foam Lumbar Cushion Backrest is a great way to give your back extra support while you're sitting. It has a unique shape and memory foam padding which offers support and alignment for your spine. Features: You can easily fit this back rest onto most office chairs. It is designed to provide additional support while you're sitting to prevent back pain. It measures 340 W x 330 D x 105 H mm. The back rest has a memory foam construction which softens with your body heat to mould to your back. It has a simple black design to blend into your decor. It is quick and easy to fit onto your seat.