I like the OR Flex-tex softshell gaiters for most uses. They wet though eventually but keep dirt, debris and yes, mud out of my boottops. The Salamanders might be a better choice for unending rain, but I don't often see those conditions.

I also have Crocodiles but only use them occasionally, for deep snow. Which is to say, very seldom.

Cheers,
_________________________
--Rick