Ladies Ribb Full Seat Regular Breeches

A friend of mine gave these to me because they were too tight for her. They are the right size for me and fit me when I am standing up and walking around, but the fabric is not stretchy?When I sit down, or sit in the saddle, the fabric in the full seat in the back doesn't stretch at all and neither does the ribbed fabric, and the back side gets pulled down a lot. So it ends up having a weird waistline where the back sits lower than the front. Maybe my behind is more plump than intended for this pants design. But I hate wearing these because of this occurence. I wear a size 28 in the smartpak breeches for size reference - and in those, the waist is loose. So I guess if you are much skinnier these Tuffrider breeches may work for you. I will say they are durable, I have had them for 3 years now and they have not broken down...but maybe that is because I try to avoid wearing them They are my only white breeches sadly so I have shown in them. Oh yeah...and wear nude panties.