A few years ago Uniqlo U made this perfect long sleeve tee- a little boxy, a pretty heavy weight cotton, chest pocket, inexpensive, checked all of the boxes- i wear them all the time. They stopped selling them sadly soon after (of course) and I had only bought like two of them then. Scouring eBay, depop, everywhere regularly though for more to build up the stock, that’s what you do when you find a perfect item, wearing one right now even
high quality fabric and a perfect fit– not too tight or extremely baggy (if you do desire a looser fit, size up). the t-shirt is unisex, comes in a variety of colour ways and is relatively affordable.
*always check ur measurements to ensure you get the correct size that suits the kind of fit you want! though it’s an extra step, it has made the world of a difference for me when finding t-shirts that i genuinely like the way they fit on me