Does any one of you have a plausible answer to my discovery, I don't know, maybe manufacturers had to use their own clothes to stuff mitts during World War II because of limited fabric supplies ?

Or does this mean I got my hand on a vintage bad quality mitt ?

In case this might help, the only thing I can clearly make out on the glove is a series of numbers : 60-4268 on the back of the thumb, and the word "sporting" partly erased by use and time above the pocket.
Thanks for your help.