I have a ghillie in progress, but got a good deal on an anorak style on the internet. Mostly synthetic strings, but some material also. The materials are tied onto a wide mesh netting, and I did not find it too hot and was large enough to layer under it in cold weather. The mesh allowed addition of more natural materials.
I found that I was able to shoot without having to cut any of the strings/material. I did modify it by making and sewing a small pouch in the chest area and "slash accesses" on the sides so I could reach pockets and necessities stored on myself.
I still hunt to where I want to set up, and knowing that it hangs up easily, try to avoid narrow openings...but going real slow, I can get most places in relative quiet and ease.