^I have the olive version. Very thin and lightweight (esp compared to normal EG fatigue shorts), but not transparent.
Two things to note, though--they run pretty big in the waist (with side fasteners unbuttoned, I think the waist on my size L is like 39 inches). And the tag says they're dry clean only, which is sort of a pain for this style of shorts. I might just go ahead and wash mine (I have cotton linen blend shirts I wash), but I haven't yet.