wool blankets

thinking about stocking up on some military surplus wool blankets......after doing a google search looks likes there a lot of knock off's.....was wondering if you guys have a good source for them....or things to stay away from i saw them ranging from 30%-70% wool.....i also found these...

I went to a large flea market last week and one of the vendors had a lot of German mil surp stuff. He had several wool blankets for 5 each but when I smelled them they smelled of kerosene. Is that normal? Can it be washed out of them? My guess is they were treated with a chemical similar...