On my recent trip to North Dakota, I was in two Cabela's stores, both dominated by racks and racks of camouflage clothing. (Ninety percent of it is the wrong colors for the Rockies, but that is a separate rant.)
The Optifade digital camo described by John Tierney has not made it into the stores yet, but I am sure it will soon enough. Tierney's longer article is here.
(Tierney's blog comments turn into the predictable pro- and anti-hunting positions. Skip 'em.)
Whatever hunting clothes you wear, you might consider washing them with something that does not contain optical brighteners. (Read the detergent label.) Birds and animals can see farther into the ultraviolet than we do, and the brighteners make the clothing reflect more UV light. Some specialized detergents such as Atsko's Sportwash deliberately leave them out of their formulas.
(Via David Hardy.)