With layers of blended British wool and viscose, home-grown flax and crisp cooling Egyptian cotton. The Hollyhock has 10,750 innovative springs; including 100% recyclable advanced Cortec™ Quad pocket springs and dual layers of pressure relieving HD 2500 micro springs. With a 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. Available as a 3', 4'6", 5" & 6" with a choice of mattress tension: gentle, medium or firm.