You can't go wrong with Smart Wool or Darn Tough socks! They're pricey but I've had a few pairs of both brands for 15+ years and they've all retained shape, softness, and cushion, and while they don't smell fantastic after multiple wears without washing, they also don't smell like, well, dirty socks. For fast-dry shirts Columbia makes some that are soft and fit well but are less expensive than a lot of other outdoor brands - but you can also get a running shirt from Target for half the price and in my experience those hold up just as well; they're just heavier and not as soft. Happy hiking!