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
Dark brown Arizona Suede Sandals | BIRKENSTOCK | MR PORTER
Arizona Birkibuc Stone | BIRKENSTOCK
The revealing history of Birkenstock sandals - CBS News
The Shoes Beloved by Deadheads and Skaters, Updated for the Fashion Set - The New York Times
Birkenstock Sandals 39 250 L8 M6 | eBay
Birkenstock Antique White Boston Clogs | SHOPBOP
Shop Birkenstock Arizona sandals with Express Delivery - FARFETCH
Why Birkenstock Sandals Sustained Their Cool for Nearly 250 Years
Birkenstock® Arizona Soft Footbed Sandals | JJill
The Shoes Beloved by Deadheads and Skaters, Updated for the Fashion Set - The New York Times