Another vote for OR Crocodiles, without a doubt the best gaiters available. No zip, step in design, high quality, various sizes, not stupidly expensive, what's not to like?
I am on my second pair in about 15 years of hard use including beating and ice climbing, the first pair are still in occasional by my girlfriend. I wore mine for two weeks hind stalking earlier in the winter and two of the other stalkers were very keen to get a pair, they were very Impressed and this is from guys that work in the Highlands 52 weeks of the year and know a thing or two about kit.