Odd facemask

[DANDY DON]

I just saw an old picture of the Cowboys Lance Rentzel with an almost translucent white facemask....I have necer seen this before and I'm pretty sure the Cowboys never sported them as a team...Anybody have any theories or info. I wish I could post the the picture (I'm new to this computer thing:o ) I'll find the web address at least if anybody is interested in checking it out...