Birkenstock Shoe London Taupe Suede Footbed Narrow & Normal NEW 1010503 | eBay
Birkenstock mule ARIZONA NORMAL BIRKO-FLOR SCHWARZ | 2889 00022SP38
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