Hat Strap Clip
thingiverse
Most of the time i don't use the chin strap of my wide brim boonie hat unless it's windy. I also don't like it flapping around on the back of my neck. This clip has a 2mm pip to grab onto the hat brim and a hole to feed the cord through, i've sized it for a 7mm cord and a 3mm thick brim. It'll need support unfortunately.
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