For enhanced render only a few changes are used for the materials, simply connect glossy input of jacket, pants and cap to texture. If you want you can change the materials of the buttons to a shiny material. The standard hair peaks through the cap. These vertices are simply pushed a bit "inside" ...
Frontish render:
Used assets:
Slot:
Head: Helmet/hat/cap
Item:
Slot:
Torso: Entire torso
Item:
Slot:
Legs: Entire legs
Item:
Slot:
Feet: Entire feet
Item:
Slot:
Other: Tool/carried/equipment
Item:
Slot:
Other: Material
Item:
Slot:
Other: Pose
Item:
Sideish render:
Backish render:
Touched-up render:
