With layers of blended British wool and viscose , home-grown flax and crisp cooling Egyptian cotton. The Elba has 11000 innovative springs; including 100% recyclable advanced Cortec™ Revolution pocket springs and dual layers of pressure relieving HD 2500 micro springs. With an in-house woven FR chemical free mattress cover and three rows of hand side stitching, this Seasonal Turn mattress has a warming wool winter side and cooling cotton summer side.