I wear a pair of Shannon Bug Barrier pants over my wading pants or waders, or even my shorts, if I'm wet wading. They serve two purposes - first, they protect the legs or waders from medium length jaggers, crown nettles, etc. and second, being camo, they break up the starkness of beige waders, or white sparrow legs. Actually, thirdly, they provide an irrational protection from snakes, when walking through waste high ferns, weeds, or other leafy matter.
The pants have a honeycombed plastic layer, which then have a nylon fabric weave on the outside. The outside layer is still a mesh fabric, but the threads are woven close enough that a camo pattern is effective when viewed a few feet back. I guess the original idea was to create a physical air space barrier, to prevent mosquitos from landing on you and biting you, but I find the pants more useful for camo while fishing, and avoiding crown nettles while hiking, and the good thing is being mesh, they don't overheat you at all.
For awhile, my fishing cap was a red plaid wool Woolrich ball cap, which was not waterproof. So I had switched that up to an Outdoor Research Seattle Sombrero (blue/black) which is waterproof Gore-Tex. However, in terms of camo, that's kind of like Winnie the Pooh using a blue balloon to blend in with the sky when he's trying to get honey from bees in the tree, so I bought a couple of supposedly waterproof camo hats off of Ebay this past summer. I like the idea of treating the hat with some adhesive for plowing through jaggers. My summer brookie getup is modeled in my avatar, and sometimes, it results in a brown being caught as well
🙂
Links:
Bug Barrier pants (unfortunately, no longer available)
Hats (search for Aussie hat, got one mesh for summer, and one non-mesh for fall and spring)