I have had a few pairs of these excellent trousers. On the inside front of the bottom hem there is a tab with a button hole. Clearly it's intended to strap bottom of trouser to boot in some way and with adjustable strap sewn into hem operate as a kind of gaitor. But short of cable tieing it to laces or using paper clip to connect it to bottom loop of laces on boot I have never figured out how it's supposed to work. Anyone out there know the trick?