This extra firm, high quality innerspring baby mattress has layers of organic cotton which are wrapped with Pure Grow Wool. Pure Grow Wool wicks away moisture, regulates temperature, and provides government required fire retardancy in a natural way. The organic cotton and wool batting are Euro-tufted by hand, using straps not buttons, to a beautiful organic cotton ticking mattress cover. Has more of a hills and valleys surface and is slightly firmer than the regular quilted innerspring.