The Ultra Plush is the softest of our five Green Mattress feels: a plush latex mattress made for side sleepers and anyone who wants deep pressure relief. Three inches of FSC®-certified Pure Talalay® latex sit over 3 inches of GOLS-certified organic Dunlop latex, with organic wool, silk, and mohair quilted into an organic cotton cover. Beneath them is our patented innerspring: up to 1,379 individually wrapped coils in seven zones. It arrives fully assembled, with no zippers or DIY assembly required.   The finished mattress is certified organic to GOTS and verified by five independent nontoxic standards: OEKO-TEX® Standard 100 Class I, EWG Verified®, MADE SAFE®, GREENGUARD Gold, and UL Formaldehyde-Free. It contains no polyurethane foam, PLA bioplastics, chemical flame retardants, or fiberglass. Each one is needle-tufted by hand at our California facility with domestic and imported materials, by a Certified B Corporation.   The Green Mattress also comes in Extra Firm, Firm, Medium, and Plush, and there’s a Vegan Mattress without wool. For a Split King, order two XL Twins. Requires deep-pocket sheets and a mattress protector.