With layers of blended British wool and viscose, lustrous cashmere wool, luxurious silk, Yorkshire wool, sumptuous mohair, home-grown flax, crisp cooling Egyptian cotton, kapok and super soft alpaca. The Snowdrop has 23400 innovative springs; including 100% recyclable advanced Cortec™ Ultra pocket springs, dual layers of pressure relieving HD 2500 micro springs and contouring Microlution Airflow springs. With an in-house woven FR chemical free mattress cover and four rows of hand side stitching, this Seasonal Turn mattress has a warming wool winter side and cooling cotton summer side.