Nationwide Shipping Available On This Item! The Natural Evolution is Hand-Made and Hand-Tufted by craftsman in California. It features thick natural cotton batting wrapped around pure, natural latex rubber with pure wool as a natural, chemical-free fire retardant material. Wool is also a wonderful sleeping surface. It is breathable, cool-sleeping and keeps its shape and comfortable properties for life. The Natural Evolution features a pocketed-coil premium innerspring unit, with heavy-duty “Quantum Coil” construction around the perimeter of the mattress providing excellent edge support and durability.