1930s Box of 6" long FLEXIBLE "Ladye Jayne" fabric covered Hair Curlers

Found in an old warehouse - Original Unused 1930s curlers.
They are just under 6" long, very bendy and covered in a soft woven fabric.
On the box it claims
"COMFORTABLE IN USE
CANNOT CUT OR INJURE THE HAIR"
THE "DIRECTIONS FOR USE" :
"Place ends of the hair between the Curler and roll up close to the head.
Bend ends over to secure."
There are 6 of them in the original box.