What head sock

ALL I like for driver protection is my head sock;;running fuel altered on just alcohol;;what on does everyone recomend me get?[i have a beard and no plains of shaving it off]single eye port////double eye port///normax//carbon x///most comfortable///single laywer//double layer//what SFI?Thinking it would be 3.3 but need other opions or if not correct SFI then what SFI?

DON
"DARK SIDE" FUEL ALTERED
BADTOYZZ RACING
775-340-5505

 

I use one made by Ringer. It's the one with eye holes. On a hot day it absorbs the sweat from your forehead and keeps it from dripping in your eyes and also keeps your face cool.