The organic cotton deluxe foundation is designed to perfectly complement your Naturepedic mattress. Our certified organic foundations are strong and sturdy for long-lasting support. They're made with FSC-certified North American wood and feature luxurious organic cotton fabrics and extra slats for additional strength. A quality foundation is essential to maintaining the integrity of your mattress over time and can make a noticeable difference in the feel of your bed as well. The extra slats help prevent the bottom of your mattress from developing a waviness that can reduce the lifespan of the mattress. Made in-house with meticulous attention to detail. No flame retardants.