Item from Potlatch Lumber Company Photograph Collection. A pair of lumberjack sandals are shown. The description on the back of the photograph reads 'Loggers' sandals worn for noon hour to protect mess hall floors from boot calks.'...
They were worn in the mess hall at lunch to keep the cleats on their boots from messing up the floor.
More boring and nich practical than you’d expect.
So lumberjack boots have steel spikes on the bottom for climbing and doing lumberjack things.
These “sandals” were essentially just spike covers so they could get lunch without having to take their boots off or mess up the floors.