The Onyx 7,750 from the Harrison Spinks Optimum Support collection of mattresses is made with Cortec™ Quad recyclable pocket springs, layered with HD 2500 Micro Springs and Posturfil pocket springs that adapt to your body’s contours to relieve pressure and provide greater comfort and lumbar support. This is a seasonal turn mattress with a warm side featuring a wool blend to keep you warm during the colder months, and a cool side featuring a moisture-wicking cotton blend close to the sleeping surface, keeping you fresh and dry during the warmer months. All 7,750 pocket springs within the mattress are recyclable, along with all-natural sustainable fillings including British wool, Egyptian cotton, kapok, lustrous alpaca, home-grown firming needled hemp and sumptuous mohair. Available in sizes 2'6" to 6' divan sets, with or without drawers, as ottoman sets and available as mattress only.