I'm sure it was just the boot model, but the last pair of Rocky's I had barely held up during a one week dall sheep huntin in AK. By the end of the week the soles were so soft it was uncomfortable to walk on boulders, and little chunks of rubber were chipping away. And the camo colored boots got worn enough to lose the camo pattern after my second hunting trip in them for elk here in WY. The gore-tex is about shot now too, and they haven't seen much use since my AK trip two or three years ago.