Tank tops are made in the USA by American Apparel; the tee isn’t.
The AA tank tops, yes. They’ll still lose some length if you use a dryer, though - in my size ML, they end up around 29-1/2" long.
I would not consider the Anvil tees to be pre-shrunk by any means. Check the sizing charts, but if you use a dryer, knock 10% off the length. Line drying, they’ll shrink less.
In any case, YMMV.