The Harmony Pure-Rest natural rubber mattress has a 7 inch pure chemical-free natural rubber core surrounded by an organic cotton fabric layer, with organically processed wool (certified by Oregon Tilth) from organically raised sheep quilted to our deluxe Pure-Rest European organic cotton fabric which ensures the wool will not migrate out over the years. Our Harmony Mattress is mold, mildew, and dust mite resistant. Available in Firm (31 ILD) or ExtraFirm (35 ILD) or SuperFirm (41 ILD). These choices are so you can choose depending on your weight and how firm you want your mattress to be. Rubber mattresses are best used on a platform slat bed without a foundation - slats 2-3" apart. Mattress Ships From San Diego, CA DELIVERY IS CURBSIDE. NYC, BROOKLYN, CHICAGO MAY BE MORE. White Glove Delivery is available - this takes the mattress, box spring into home and sets up and removes debris. Call for quote. FOR HOMES OR APARTMENTS THAT HAVE ELEVATORS, STAIRS, ETC. , CALL FOR QUOTE.