The Saatva Classic, Loom & Leaf, Saatva HD, and Saatva Youth mattresses use a natural, plant-based thistle flame retardant made of wood pulp bonded with a small amount of polyester. Zenhaven uses a natural 100% organic New Zealand wool as a flame retardant. Solaire uses Paladin, which is composed of flame retardant rayon fibers blended with polyester fibers. We do not use any harmful chemicals or sprays in our mattresses. To learn more about Saatva's eco-friendly components, see our Green Initiatives page.