Does this bra exist?

[QuestionableMouse]

Cotton or high cotton blend (or similar natural fibre)
No scratchy lace
Non wired
No thick clunky straps
Around a size 38/40H (I haven't measured myself in a few months but I've been losing weight so won't be bigger than that.)

I have sensory problems and I'm really struggling to find a nice supportive bra that doesn't make me either uncomfortable or almost panicky.

Thank you!

I don't think it will exist for your size.

Have a look at the over fifties catalogue, they have some lovely bras in there. You don't have to be over 50.

Look in the maternity section for stores like bravissimo, Debenhams, fig leaves etc

You'll probably be able to fit most of your criteria with the exception of the strap width- thin straps on a non wired bra in that size range would be painful.
Have a look on Amplebosom but ignore their measuring guide.

The Royce Ava might be worth a try.