Thin thermal long sleeve tops

[Stumpedasatree]

I have several of these from Uniqlo and John Lewis and Gap, of varying thickness, I live in them in the winter!

My favourite one is an old Gap round neck long sleeve thermal top that’s very thin and stretchy and like a second skin. I’m looking for some more similar for a base layer - Gap have sadly stopped doing them. The Uniqlo / M&S / JL ones don’t have the thinness and stretch I’m looking for. I don’t want a ribbed top. Any ideas?

I am following with interest - I haven't been able to find anything like this yet but I want them too. All of M&S' thermals are so thick at the moment and you can't always wear them under tighter tops. I had wondered if there would be some kind of Amazon miracle solution but it's hard to know without feeling them.

Sainsbury's have these each year - my daughter loves them.
The M&S heatgen Level 1 thickness are quite thin and stretchy (I know you said no to M&S but there are different thicknesses).

https://tuclothing.sainsburys.co.uk/product/tuc137416331
This is one from last year. I've just looked - they're not online yet. Often they come in a two pack.

Primark had very thin thermals last year. I have a few, I’d recommend them.

The M&S heatgen level 1 are very thin and stretchy. In fact, they're so thin that I can't wear the cream ones without an extra layer as they're completely see-through.

I have the M&S ones you get in the underwear department. they are really thin and warm. I've got long and short sleeved ones and wouldn't be without them.

I've also got merino wool ones which I got in Aldi, very good for the price.

I live in decathlon merino long-sleeved tops throughout winter - not normally as a top layer, but as long-sleeves under a t-shirt/jumper.

Knitted, thin, feel like they'd be a bit scratchy but they aren't. I prefer the mens ones to the womens, just because of the colours normally.

The merino ones are fantastic for warmth but not that easy or comfortable to wear under tighter jumpers etc.
You could get a silk one -they’re v nice to wear. They’re not as hard-wearing as others though.
I find the lightest warmth Heatgen or Heatech ones fine.

Intimissi do beautifully thin thermals. Long sleeve v wide neck. Absolutely lovely

Aldi do good merino thermals (in Australia) though annoyingly the women's are invariably v-necked which in my opinion undermines their purpose, so I buy the men's small size.