I thought I invented the first "iWatch Sweatband" because I wasn't about to not wear it to work but in concrete construction things can get rough especially around gritty concrete/sand/grout etc... So I cut several bands from a black tube sock and then covered my wrist watch perfectly even quite strikingly I might add! It also makes you more low profile if you don't want to draw attention to it for whatever reason or circumstances.
Great idea. Do you have a photo you could share? Would love to see what it looks like.