The only thing a Sandana would do is make your head slightly larger, which may make it easier to get a tight fit with the mask. Have you tried tightening the straps though? They can get pretty small, I don't see how it could not fit.
tighten the straps of your mask with nothing on your head ans then take it off and put your bandana, head strap etec on then the mask back on and it will be even tighter. I do this and my mask never moves
Shipyard Ale Paintball
"Originally posted by DYE=cool: One time, me and my friends used marijuana needles, to make a long story short my penis fell off."
Tighten the straps and try moving the straps further up the back of your head. You can always try something like a JT pro-flex, it comes with a chin strap. Although I've never actually seen anyone use it.