Funnily enough I was thinking the same thing. The collars go on mine farily quickly. Apparently UNIQLO t shirts are pretty decent pound for pound. Only started wearing t shorts again over the past couple of years but my go to item now (white ones after a few months 'buffing' up in the gym :) )
https://www.sunspel.com/uk/
Without doubt the best t-shirts I’ve bought. Some are 4-5 yr old and remain in shape and great condition.
If you shop around they usually pop up on sale on sites like Mr Porter ect.