From Wiki: This type of headgear was designed for use in outdoor sports (especially golf, tennis, and volleyball) where eye protection from direct sunlight is desirable, but is now often used by non-athletes at beach and other sunny outdoor events. The strap can function as a sweatband. Of course it is used for running also. It is not so simple to combine it with strand hair in Blender but even if you use it with polygon hair you normally must change geometry. A normal map is supplied. The leather litsphere is used to make the effect visible in Makehuman.