I bought my first pair of Birks in the spring of either 2016 or 2017, and haven't looked back since. I now have two pairs — the second I got in 2019 — and while the first at this point needs one of its bottom soles replaced, they're both otherwise in excellent condition, which is remarkable considering I literally go back and forth between them and my Rothy's almost exclusively anytime the weather is above 70 degrees. (Also remarkable: you can legit get them repaired! You'd just have to find a certified repair center near you, using the brand's handy map.)
I've taken them to Mexico City and Italy along with all the time I spend wearing them in NYC, and on both walking-heavy trips, they kept my feet consistently comfy and blister-free. The secret's twofold: their cork-blend bottoms, which are made for all of our Goldilocks feet (not too cushiony, not too hard, but juuuuust right) and their leather straps that are soft where they meet your feet, so even if you have rose gold shininess on the top, you only have soft, non-blistering leather touching your skin. Their support is the only thing that helps keep my plantar fasciitis under control (I also own a pair of their arch supports, which I often wear with my Rothy's), and I've been known to wear 'em around the house in the winter for precisely this reason.
Promising review: "I purchased these for a two-week tour of Italy four years ago and they were great. Lots of walking and standing without foot pain or leg fatigue. I have worn them ever since and after four years, needed a second pair. The color goes with everything. Great arch support and no flopping like a traditional flip-flop." —Dee L, Zappos Customer
Get them from Nordstrom, Zappos, or Free People for $79.95+ (available in sizes 35-46 and multiple colors and styles). All three places also have a waterproof version available, too, if that's something you need! (FYI, the brand doesn't sell on Amazon).