The soft super fine fibres of angora wool have millions of microscopic air chambers that naturally regulate temperature so these angora insoles will keep your feet warm in winter yet cool in summer theyre also just 3mm thick so they can be worn in any footwear even ballet pumps and court shoes and even under or over your own orthotics theyre especially good for wearers of half length orthotics where you have to remove your original shoe linings and end up with no padding under your