checkout shirtspace, or any site that lets you order shirts to print on. They're usually a few dollars each and you can get them in bulk in different colors. Different fabrics, styles, weights, etc. Literally shopping for tshirts by specs instead of look.

Tshirtwholesaler, try a few different shirt brands and styles out. There's so many that are plain white (or color) tees, only potential branding is against your neck on the inside of the shirt. I actually dontind having something there, because sometimes someone's like "Hey, what kind of shirt is that, it's soft, I like the cut, it wears nice," and then I direct them to the tag or print at the inside collar for information.

Bronson Mfg has some good solid shirts that are 100% cotton.

Hmmmm, sounds like advertising....

Very smart, giving money to a company and not using their product because it has a logo nobody will ever see...

YOU FORGOT THE SWOOSH BITCH you can almost hear the child laborers yelling at me.

I wish it was only a desirable brand problem. I used to get Skechers and not only have they gotten way too expensive for what they are (like, stay in your lane you're basically Payless Shoesource) but they put a bunch of tiny labels on their "propriety technology" now. Look at these ugly things. https://www.skechers.com/skechers-slip-ins-go-walk-workout-walker/217196_OLV.html

But so do the knockoffs