I have a large sellection of "earth-toned" 100% wool sweaters that I have purchased at the local Good Will store over the last few years. I don't think I have paid over $5 for any of them. For pants I have a couple pairs of heavy wool hunting pants,but for warm weather you can pick up some light weight 100% wool gray or brown dress pants from the Good Will for about $5 a pair.
Personaly I have worn plain old "blue jeans" hunting for most of my 49 years. Yeah, I know..... "Cotton Kills!!!" blah....blah....blah..... But I'm not dead yet!!!!! LOL
A few years ago I made myself 4 pair of "huntin' jeans".....
I bought 4 pair of black denim jeans from the Good Will store,came home and threw them in the washing machine with 2 cups of liquid bleach,and let them run through a complete wash and rinse cycle. Then I ran them through another complete wash cycle with clean water. The end result.....
4 pair of "dirt brown" Huntin' Jeans!!!!!