Welcome, @autnchris. I moved your great question to the Autoimmune Diseases support group https://connect.mayoclinic.org/group/autoimmune-diseases/ where you'll meet other members who live with Raynaud's like @laurie6 @slward1951 @kelvinthomas @ninajp @nmc7 @seniormed @vlharvey @sandicam and more.

In this discussion, some members talk about clothing to keep warm
- Raynaud's Syndrome: Anyone want to talk about Raynaud’s? https://connect.mayoclinic.org/discussion/raynauds-syndrome/

But you're asking specifically about sensitivity to clothing, fabrics, seams, etc. You might find some tips in this related discussion:
- Clothing & Allodynia Help
https://connect.mayoclinic.org/discussion/clothing-allodynia-help/
.
Chris, what fabrics are you able to tolerate against your skin?