Columbia Bugaboo Boots 5.5 Women's Blue Gray

I'm not sure which version these are - II, III, or IV. I only wore them for maybe 2 months in late winter. My husband and I each have a pair and we love them for staying active in the winter! However, I got a pair of Muck boots the next season for working at the barn, and I find myself using those more than these now. Trying to thin down my shoe collection, haha! No flaws. Size 5.5 and fit even with a pair of thick socks! I'm a 5.5 in flats and heels but normally size up to 6 for winter boots. Plenty of toebox room.