Hi Anne, my most useful long-sleeved layering top is Australian, bought in St Kilda Melbourne on sale in 2015! 55 wears since then. The brand is Ajoy, I just looked it up, originated in Melbourne. My other 2 favourites are NZ brand Pagani, they are 3/4 sleeved which I really like for my work as when examining patients the long sleeves are not in my way, of course cannot wear on the coldest days. I checked the Pagani website, they don’t have the exact same sort at the moment.
Australian brand Black Pepper does my favourite skivvies. I have owned 6 of those over time. They may also do crew neck, what I buy is mock turtleneck, sturdy and wear like iron, I bought 3 of them more recently. Nice colour range. You couldn’t go wrong with the quality of those. Not the most fashion forward but I look to have interest elsewhere in the outfit