The Double Bed Pocket Spring Mattress is designed to offer optimum support. Each pocket spring works independently, reacting only to the pressure applied to that area to provide maximum comfort. - Pocket spring mattress to fit double beds. - Pocket springs work independently, reacting only to the pressure applied to that area to provide maximum comfort - 100% polyester outer layer This mattress has medium firmness. It offers the perfect balance of firmness and conforming, providing support whilst still sinking slightly to contour the body. - Boori mattresses are compressed and rolled when they leave our factory, this makes them more eco-friendly to transport and easy to store!