No. 3 introduces Pillow Top. Its an extra layer of memory wool that’s added to the mattress surface for an incredible depth of comfort. Beneath that, No 3 holds 1400 pocketed springs and is filled with even more natural materials – cotton, wool, soft bamboo, fleecy alpaca & silky pashmina. Elsewhere, the hand-tufted fillings keeps the mattress at its best and we add further layers of wool for even more comfort. Mattress Tension: One tension.