Redington I/O Fleece Pants are super thick fleece and keep you warm on the coldest days. I always wear them on those super cold winter steelhead days. I also always have a thin, tight-fitting, wicking layer under them which wicks better and holds heat closer to your body.
The Redington I/O Fleece Pants come with stirrups built-in to keep them from riding up when you pull your waders on. This seemed like a great idea, but I quickly cut my stirrups off. The pants are tight enough around the ankles that I didn’t feel the need for them and it just makes them quicker to put on and take off.