With layers of blended British wool and viscose , home-grown hemp and flax, crisp cooling Egyptian cotton and sumptuous mohair. The Hvar has 16000 innovative springs; including 100% recyclable advanced Cortec™ Revolution pocket springs, pressure relieving HD 2500 micro springs and contouring Microlution Airflow springs. With an in-house woven FR chemical free mattress cover and three rows of side stitching, this Seasonal Turn mattress has a warming wool winter side and cooling cotton summer side.