November 26, 2004 A new smart-fabric derived from the properties of pinecones has been developed by the UK based Centre for Biomimetic and Natural Technologies. The fabric adapts to changing temperatures by opening up when warm and shutting tight when cold just like a pinecone's scales do in nature, and is just one of the emerging developments in the burgeoning field of "biomimetics". The "breathing" fabric is designed to stop the wearer getting hot or cold by adjusting itself to both internal and external temperatures. The textile is made up of a layer of thin spikes of wool, or another water-absorbent material, that opens up when it's made wet by the wearer's sweat. When the layer dries out, the spikes automatically close up again. A second layer underneath protects the wearer from the rain.