Traditionally, Wool is used as the ideal comfort layer and is available in several blends;
Vertifill Wool, a vertically oriented thermo-bonded non-woven its unique properties provide excellent resilience, recovery and help prevent settlement due the vertical structure of its fibres. 500gsm Needled or Layered Wool generally provides the more regular type of top layer.
While 500gsm Wool and Silk 80/20% mixes provide a more exotic mix to promote the marketing story. Other exotic materials are also available [LINKS]: camel hair, alpaca hair, bamboo and silk.