Advice on Frozone Halloween costume

[BuzzBiteyear]

My son would like to be Frozone this year for Halloween. My sister who is very good with custom clothing has agreed to make him a costume, so the big part is set. The thing I'm trying to figure out is what to do with the "glasses/mask" Frozone wears. The best I can come up with is a pair of athletic-type sunglasses with blue lenses. Any other ideas for this part of the costume?

 

[BuzzBiteyear]

Here's a couple that I've been looking at if going with sunglasses would be the best bet