It takes a long time to wear out a Birkenstock, a favorite sandal of Boomers (with or without socks). Here's a comparison of a new pair to an old pair worn daily
Sandals Flip Flop Mephisto Niels Nubuck Brown Type Birkenstock | eBay
Women's Birkenstock Franca Vegan Color: Iridescent Light Rose – Brown's Shoe Fit Cape
Papillio by Birkenstock Glenda Flatform Sandal in Faded Khaki - Women' – craigsshoestore.com
Mephisto Madison Comfort Sandal Strada Shoes Northampton, MA
These Birkenstock Dupes Are Only $32 for Prime Day