hi without knowing what your boots actually look like, i'd say, about 4000 polys each should be enough. if it is REALLY and ABSOLUTELY necessary for the details, well, ok, add another 1000 for each then. but i am sure that your boots don't need more. pls keep in mind, that polys eat system ressources, they increase render time and can be one of the reasons for freezing renders. yeah, sure, i know how easy it is to get carried away with details - still, pls think about it... ;)