Yes it's elementary knowledge known to some SS cloth collectors, that the SS used local free labor for uniform/cap mfg., but little or nothing at all is mentioned in many reference books as to where a lot of the cloth came from to make this stuff. Robin Lumsden's inexpensive book "SS Regalia", on page 119, provides very good information on this subject, but generalizes like this; "used local Jewish labor to manufacture uniforms & equipment from property & raw materials seized by the Germans", instead of being specific as to exactly what that property & raw material was & how it was seized.