Are slips still a thing?

[MrsFionaCharming]

I wear mostly 50s / vintage style dresses, which is fine in summer but starting to get too cold.

A slip seems to be the perfect solution, but I can’t find one which meets my requirements:

Around knee length
Non-sweaty fabric
Low in the front for under low cut dresses

I’ve checked M&S, Debenhams, and Figleaves. Any other places I should check?

I’d go for theM&S microfibre ones. I wear them a fair bit under nonlined work dresses. They are comfy, come in white, nude and black, wash well and sound like they meet your fitting requirements!

You may have to go on the internet but the M&S ones aren't sweaty from experience

primark often have quite a decent selection of slips...maybe the "wear your own bra" type might suit if you don't want any showing?

I wear a vest and an M&S waist slip as my base layer.