No helpful reviews here, just a question. I'm confused...is this a two-piece boot? Or is it just designed to look like that? Looks like someone slapped a pair of those smooth grain half chaps on top of rubber barn boots.
Not sure... Usually the sorels have a -40 felt liner so definitely not your typical rubber barn boot. Sadly the only reviews are from nom-riders so it's hard to tell how the fit is for riding and if the "half chaps" are removeable or not.
Kenetrek of Montana has a winter boot made for riding, but it may not fit an english stirrup, it's designed for western stirrups.
But I would bet that they are good quality and warm. http://www.kenetrek.com/cowboy.asp
I don't know about those Sorel boots, but when I was living in NY I rode in regular Sorels regularly. I changed out my stirrup irons to accommodate the bulky boots, and my feet stayed toasty warm.
I did the same thing when I lived in Maine & PA. Love my Sorels, sort of sad that I don't really need them in SC. (Though it's 22 deg here this morning!!)
As to what Irons, I just went up a size, I think 5s? I bet the wide bottomed endurance stirrups would work well, so long as the width was ok. I didn't really do lessons or serious schooling in them (spurs don't fit well!), but they were great for trail rides and leg-stretch kind of rides.