Thanks @maximillian for posting this!
I've been wearing Birkenstocks since I was in my 20's! In fact, that's how I "found" QVC! We had moved and no one around carried any styles except the basics. I Googled them.
The vendor was Claudia. I ordered 3 pairs from the website before I started watching the shows.
I love mine, and I have quite a few. I also have black shoes that weren't available long.
I have found other comfort shoes, like Alegria and Revitalign (Spenco), but I still wear my Birks. 