If you are deployed in field you must have one of this

Combat Engineer - Overcoming Obstacles is a Way of Life' Crew Neck

increased performance

( (Left Parenthesis)

Tactical Shemagh - Olive Green - Gun Pattern

Military Boonie Hat - Woodland Camo Size:62 cm If you are deployed inBoonie Hat Woodland Camo An extremly well shaped boonie hat with nylon webbing loops, sweat band, vent holes and adjustable chin strap Polyester Cotton fabric Inner corduroy sweat band and lining 4 vent holes made of brass which do not rust Nylon webbing loops Adjustable chin strap with cordlock Available in various head sizes Colour: Woodland Camo Made in India Sizing: Measure the circumference of your head where the hat sits in centimeters to find