Organic cotton filling provides additional cushion and support over premium 7″ encased coils for a comfortable design that promotes airflow to reduce overheating. The quilted surface features wool batting, which provides superior temperature regulation. The Verse is certified organic and is designed without common allergens, glues, adhesives, flame retardant chemicals, or other questionable materials. Naturepedic uses only U.S. grown and certified organic cotton as filling for its mattresses and buys directly from USDA certified sources. This increases purity, organic reliability and support for U.S. farmers. The surface fabric is soft to the touch and easily stretches to conform to your body. The PLA comfort layer adds resiliency and improved moisture wicking for a more comfortable night’s sleep. PLA is a plant-based material which is made from non-GMO plant starch and does not contain (or off-gas) harmful chemicals.