had a pair of burma boots about 3yrs over the season noticed me right boot wasn't feeling right ignored as long as possible but finally had a poke about this resulting in the midsole disintegrating around the heel,these aren't cheap,looked into having them resoled £70 and was told in 3years it could happen again,even left unused,so told him to whip me a pair on,not lol.the midsoles are made from polyurethane.does anyone knew of any good boots that don't have that problem