I bought a pair of the green RHS Muckster ankle boots, which were very comfortable and just the job for walking dogs in mud.
Sadly, one boot split right across the sole, letting in the wet, after just a year of wearing.
I have now purchased a pair of Muck originals pull on ankle boots in blue, with a different sole to the green ones.
I very much hope that these boots will last me a little longer than my first pair, as they are so useful!