This unique foundation is the perfect addition to provide additional support for both latex and pocket coil mattresses. It is a one-inch mat made of coconut fiber (coir) with natural latex and wrapped in an organic cotton cover. The SFL allows air circulation between the bottom of a mattress and a platform bed's surface. It is strongly recommended for breathability under any foam mattress on a solid-platform bed. Where inadequate air circulation is a concern an SFL may be advisable on a slatted platform.