I use a neck buff that i pull up over the head at the back and down to mouth at front.keeps wind and bugs out of your neck/jacket and helps keep your lid liner clean and less helm hair.In winter i sometimes swap that to a silk balaclava.
Wear a turban or have i just started a massive racist debate
If you are having trouble with helmet hair check out the product reviews on this stuff.http://www.amazon.co.uk/product-reviews/B000KKNQBK
Us girls have been putting up with helmet hair for years