Yes, it does but check with the manufacturer to be sure. My lady puts her new panty hose in the freezer for a few days before she opens the box. Claims the panty hose lasts longer and fewer runs. I don't know if it works or not.
By
11/18/2009
Nylon pantyhose has a fairly long shelf life especially if it is new /unopened / not worn. It is the pantyhose that has some spandex in it that will have a shorter shelf life as it loses it's elasticity over time. (Like support hose, light support hose or even some manufacturers add a little bit of spandex for a better fit.)
I had some pantyhose that was over 10 years old. Some of it was fine and some the elastic in the waistband 'rotted'...when stretched out it made a crackly noise and never stretched back into shape. The leg part was fine though.
I suppose it also depends on storage too. Kept away from excess heat, light, moisture etc.