With layers of blended British wool and viscose, lustrous cashmere wool, luxurious silk, Yorkshire wool, crisp cooling cotton, sumptuous mohair, home-grown flax, and sustainable Ecotex. The Tahiti has 15900 innovative springs; including 100% recyclable advanced Cortec™ pocket springs, pressure relieving HD 4000 and HD 2500 micro springs, contouring Microlution Airflow springs and Posturfil pocket springs for targeted support. With an in-house woven FR chemical free mattress cover and four rows of side stitching, this mattress is turn free for your convenience.