Hate to be a pain Mike but can you describe the beanie material a bit more, ie most beanies I've seen are made of somewhat open weave wool, I find they tend to let some cold air through.
By means of comparison I have one made of a "solid" closed weave synthetic material that is absolutely windproof but still retains a bit of stretch to fit snugly - ironically I bought this at 'Woolies'.
If the beanies are good and warm (which I'm sure most folks here will need geographically speaking) then I'll probably be in for 2 or 3.