With layers of blended viscose and British wool, kapok, super soft alpaca, sumptuous mohair, crisp cooling Egyptian cotton, home-grown flax and sustainable Ecotex. The Lupin has 12000 innovative spring. With an in-house woven FR chemical free mattress cover and three rows of hand side stitching, this mattress is turn free for your convenience. Available as a 3', 4'6", 5" & 6" with a choice of mattress tension: Gentle, Medium or Firm.