Cotton is the absolute WORST thing that can be put in hunting clothing - be it camo or undergarments. As stated cotton is the quickest to fade but more critical is the fact that cotton absorbs and holds moisture. Wet or damp cotton clothing is tough to dry out and can quickly lead to hypothermia in cool weather. Personally, I absolutely won't buy any hunting clothes with cotton in it. IMHO, the best materials for camo are the microweave polyesters like Wolfskin or Microtex. These materials won't fade, dry very fast (they don't aborb water like cotton does), won't hold burrs, wear like iron, are quiet, and are fairly wind resistant.