With layers of blended British wool and viscose, a British wool and mohair blend, a cashmere, Yorkshire wool, silk and British wool blend, a British wool, hemp and flax blend and a cotton, hemp and flax blend. The Diamond mattress features 25,000 of our award-winning springs, including Cortec™ Quad spring system and multiple layers of HD 4,000, HD 2,500 and HD 2,000 micro springs. With an in-house woven FR chemical treatment-free mattress cover and four rows of diamond side stitching, this Seasonal Turn mattress has a warming wool winter side and cooling