I've used 9MM maille against knives and stuff, actually the wedge riveted with solid links is pretty decent at deflecting blows especially the solid links, as is the GDFB dome riveted stuff. The Icefalcon maille seems thinner and more prone to failure but it's lighter. My coif I refuse to even test out because if I damage the links I have nothing to replace it with. I would assume it's as good as period maille if not better because it's tough stuff. Sure it's small links that are around 17-18 gauge but it's probably tougher than Indian stuff. But it all depends on quality, indian round riveted is weaker because they punch the material away, wedge riveted just uses a drift to push stuff away similar to period maille, even period dome riveted maille used a drift rather than a punch and the rivets were often cone shaped rather than mushroom shaped like modern repro maille. I'd have to dig up the article again, it was some translated norwegian article on maille and it showed how the links looked, it even had some original maille chausses in the article which were tie in the back types, they even had bigger rings to link them together, which could explain the teeth on the period art of laced chausses.