All my hunting clothes came from Walmart and is a mix of mossy oak and real tree. Been using the same stuff for 10 years, never washed any of it and it has held up well. My favorite pair of overalls got ripped 10 years ago and I had to switch to pants cause apparently they don't make uninsulated overalls any more. The ones I had were first gen mossy oak walls brand and were probably 10 years old or older.
You haven't washed them in 10 years?