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
Birkenstock Boston Clog - Moosejaw
Boston Wool Felt Anthracite | BIRKENSTOCK
Birkenstock clogs BOSTON LEDER BLAU SCHMAL
Birkenstock clogs BOSTON LEDER BLAU SCHMAL
Boston Leather White | BIRKENSTOCK
Amazon.com | Birkenstock Men´s Boston Black Leather Sandals 44 N EU N 060196 | Mules & Clogs
Birkenstock Boston Clog - Habana Oiled Leather, Size 43 for sale online | eBay
Birkenstock Boston schmal Größe 43 in braun in Nordfriesland - Tönning | eBay Kleinanzeigen
Amazon.com | Birkenstock Boston Classic Arch Clog,Black Oiled Leather,36 M EU | Mules & Clogs