Found this seller on Ebay... No connection etc but seems a good price
http://www.ebay.co.uk/itm/6x-8mm-th...57?pt=UK_Men_s_Shoes&var=&hash=item2a27483529
http://www.ebay.co.uk/itm/6x-8mm-th...57?pt=UK_Men_s_Shoes&var=&hash=item2a27483529
Easiest is to burn some fibres and see if they burn readily like polyester or scorch like wool. Other way is to wet the insoles and measure their weight before and after wetting. Pure wool products absorb water much more than e.g. polyester or polyamides.How would you tell??