[AtlUmpSteve]

I consider my mask properly adjusted when it sits on the bill of my cap even without the back strap behind my head. In fact, I set the back strap up about 45 degrees, which helps it slide off without any incident when you pull the bottom of the mask out, istead of up. The motion is similar to a hinge on (or above) the bill, then pull up.

But, it is important that the plate hat fit somewhat snugly.