Not only does the tactical helmet makes you look cool, it also has the function to protect your head during a skirm. Not only it protects your head from flying BB's, but also from low hanging branches or falling branches.
A helmet needs to fit well on your head to make sure it won't irritate during a skirm. A helmet fits well when it fits firmly on your head and is not wobbly. QTAC has many different kinds of helmets with padding inside and some have the possibility to adjust the helmet inside to make it fit perfectly.