I've tried many snake boots. Chippewas, Danners, Rocky's, LaCrosse, Redhead. I found the Readhead side zip camo snake boots to be my favorites, and have worn them for years. They're lightweight and comfortable, and they hold their waterproofing as well or better than the others, but they're getting hard to find. I think they may have stopped making them. I needed a new pair for this spring and couldn't find them, so I had to get a similar pair of Rocky's. I mainly hunt in Dixie, so snake boots are a must.
For cold weather hunts, I have a pair of 2000 gram Thinsulate regular hunting boots. If it's cold enough for those boots, the snakes won't be active.