The Birch Natural is a medium-feel mattress made with organic, hypoallergenic materials designed for eco-conscious sleepers to provide a safe and healthy night of sleep. Made with GOLS certified latex, organic cotton, natural wool, and durable steel, the Birch Natural Mattress is foam-free, fiberglass-free, and is GREENGUARD Gold Certified for low VOCs. On a scale of 1-10 where 10 is the firmest, the Birch feels like a 6: latex layers cradle with a plush feel.