18yds of 1940s French SPECIAL WEAVING "Never Twists" Lingerie Shoulder Strap

A silky material and a "special" weave ensuring it never twists, this 1940s cord/ribbon for making lingerie shoulder straps is 6.5mm wide and comes in
 ivory white or pale blue.
Washable.
Made in France.
Some have slightly grubby outer layers from long years of storage in the old warehouse where I found these.