The Chorus features a layer of 1.5″ micro-coils over 8″ of premium encased coils for a comfortable design that keeps you cool and relieves pressure points, so you’ll be dreaming in no time. Naturepedic uses only U.S. grown and certified organic cotton. Organic wool facilitates healthy, well-treated sheep and the elimination of harmful chemicals in the processing of the wool. The PLA comfort layer adds resiliency and improved moisture wicking for a more comfortable night’s sleep. PLA is a plant-based material and is made from non-GMO plant starch which does not contain (or off-gas) harmful chemicals. This organic design eliminates the need for flame retardant chemicals and chemical flame barriers while still meeting all federal and state flammability standards.