These are great for a riding boot!  Very comfortable, right out of the box (and I have ridiculously sensitive skin).  Attaching some pictures, worn with skinny jeans.  Yes, the aubergine have an odd pattern, but I don't mind it - somewhat splotchy, not sure for what look they were going, but definitely do not mind for the price paid.  I needed a good riding boot, so I ordered a few online to see what would work, and these are PERFECT!  The outside zipper is more for show and to keep open in case you want that look (or need it), but I don't want/need it - with a borderline narrow foot.  I normally wear 8 to 8.5, and the 8.5 is perfect for my needs - very roomy in the toes.  Was a bit tight in the ankle at first, but I probably have a high arch, and after a day of 100 miles with 4 stops (maybe 0.25 miles of walking), had stretched to be exactly what I want in a riding boot.  (I ordered a size 8, as well, and they sent me a 7.5 - which actually fits, too!  Tight to get on, but I suspect they will stretch to be workable.)  I expect the 8.5 to be on the large side after a few wears, but I don't mind that for a riding boot.  I just ordered 2 more pairs today, both 8 & 8.5, in different colors.  Can never have too many good riding boots on hand.  :-)
Update:  Wore these (size 8.5) for 2 other riding days, both much shorter than the first, and they have stretched to be quite roomy - even with not a lot of walking around.  I did get caught in the rain for a short time, though.  I suspect the size 7.5 will work out fine, too, especially in summer with thinner socks.