The Muck Boot Company's Mudder Tall look like your average wellies. They're chunky rubber boots that come up to just below your knee and are primarily designed to provide a barrier to mud and water.
My go-to boots are the Muck ... out mud, water, and snow, but there are lots of mid- and ankle-high styles, too. If you’re frequently in deep snow or water, it makes sense to go for knee-high ...