Don't know if it's already been mentioned: Neck gaiters (the buff/had kind)! Last time I bought genuine buffs, they were on sale in a Spanish online shop for around 7...8 Euros, I think, which seemed very cheap back then and much more so today. Just for context ...
On ali, there is a 3 pcs set for 2 bucks in the 3-for-6 section (5 different options, 3 different prints each).
Other than that, they go for below 2 bucks up to 3ish when bought separately, still cheap. I have one of those 3 pcs sets and they feel pretty much like my genuine buffs. Can't say anything about longevity, but for now, I like them; ordered a bunch more with different prints from the coins discount section, too, for effectively around 1 buck a piece.