Spring Air Natures Rest Latex Firm mattress is designed to be natural in all the right ways. The 100% all latex mattress is fully encased in our 4-way Stretch knit linen infused fabrics to help ensure you sleep cool and comfortable all night long.  The firm mattress model features a multi-layer design consisting of 2″ Comfort quilt foam placed over layers of Extra Firm and medium latex with a 6″ Natural Latex Support Core. This unique design provides you with buoyant, body conforming support with a firm, supportive feel. The latex is fully supported with a 2″ heavy duty support base foam..  Each Talalay layer is tested 9 times to ensure a consistent feel.  The linen is 30% thicker then cotton.  Linen and Talalay are hypoallergenic as well as resistant to insects and microbial growth. Talalay latex delivers a unique and buoyant feel. The Talalay and linen combination provide a cooler sleeping experience since both materials are breathable.  Talalay is super durable (it is used in airplane tires).  It is luxurious, safe and eco-conscious by Eco Institute.  Linen and Talalay are biodegradable.  Linen is made from the flax plant and Talalay is made from the sap of the Hevea tree.