Spencer gives a helpful overview of different kinds of fabric you might consider for various undergarments.
Andie: Adaptive Gender Euphoria — sewqueer
Spencer: Fabric Types for Undergarments — sewqueer
How to Sew Lingerie for Beginners, Part 1
Denver Hayes Women's 3 Pack Cotton Stretch Modern Brief Underwear
Spencer: Fabric Types for Undergarments — sewqueer
Spencer Pants Sew Along Part 5: The Finishing
Marks & Spencer Women's Cotton Lycra Lace Waist Full Brief Panty
Sew-organised-style
Kwik-Sew Method for Sewing Lingerie: Martensson, Kerstin
Andie: Adaptive Gender Euphoria — sewqueer