I've been getting damn blisters on the arch of my right foot for a few weeks now, for no apperent reason...or so I thought , until now. It did co-inside with a large purchase of special 1000 mile running socks. Lots of padding etc, so I thought couldn't be the probelem. But I noticed there is no inside padding on the arch. So have now bought some Thorlo socks which do. I hope this solves my problem, as £1.00 each for blister plasters is not good.