I have purchased fabrics online for many years, restriced to going out, also only 2 fabric stores in my area.  I found BRITEX, okay, also, Elliot Bergman, in NY, wonderful service.

I did learn, that many knits are viscose.  I do not like viscose!  It has very little body, and wrinkles.  Sonmething I figured out after many purchases.  They have  wonderful selection of linens, plain and printed.  Apparently a lot from Italy.  Also, a lot of silks.