I can't remember the last time I had a t-shirt last a year. Anyway, I was going to suggest adding Borax, but that's a US thing I guess. Add vinegar to your wash and hang dry. That worked on my gym stuff back when I actually went to the gym a lot.

[–] Renohren 3 points 1 week ago* (last edited 1 week ago)

My European made T-shirts last about 3 years, thick, solid color, 100% coton (and it's 100% french sourced, processed and made if you chose the linen ones but you can wash very hot linen yet can't spin linen at high speed or it shorten) . But they cost a fortune (65€ a pop) and it's a pain each time I get to buy some (I'm just a bus driver, not a tech mogul) but in the end, I think the cost levels out with cheaper shirts trashed regularly. ( If anyone's curious: https://www.le-tshirt-propre.fr/ )