The Therapedic bunkie board wood foundation is a standard foundation commonly used for bunk beds and similar items where a very low profile deck is needed. This is a non-flexing foundation. There is a cross slat network on top, with a fiber layer placed atop the top slat network (instead of cardboard) to help minimize noise. The covering is quilted with FR fiber to meet the FR guidelines when used with a modern mattress. IMPORTANT: Be sure to use in combination with an appropriate slat support network.