Up until the 1920s, men (and occasionally) women used to wear spats as ankle guards to protect against mud and rain. They fell out of fashion when city streets became mostly paved.
Spats were still common enough in 1927 that the March 15 1927 edition of the Toronto Daily Star contained two ads that mentioned them.
The first was an ad for a dry cleaners and dye works:
Parker’s Cleaners still exists today in Toronto (I’m assuming that it’s the same firm).
The second ad was for a cleaning fluid:
Carbona cleaning products still exist today too. I first heard of them when I heard The Ramones’ Carbona Not Glue.