We just had a cold front come through and was in the singe digits here.  Having the beanie with the built in clava is great.  The clava folds into the beanie if not being worn(it's a little wonky feeling - but still works), but I've been using it as a built in scarf(just pulling down to cover my neck) and love it since I don't need to wear a scarf as well.  It's stylish too, so my wife loves it.  Great buy, great product, and stay warm my friends.