I have been using a Helikon Tex Pilgrim Anorak Jacket almost exclusively over the last twelve or so months. It is utterly brilliant. Normally, I do not like the over-the-head kind of tops but the deep zipper and ventilation possibilities offered by this have exorcised that prejudice. The fabric, a textured poly-cotton with a little bit of stretch, is superb: very hard wearing and copes well with the spits and crackles from a fire. It is sized sensibly so that you don't feel as though you're wearing a giant's skin when you're just in a shirt underneath it but there is room for layers when it gets chillier. As with most poly-cotton stuff, you can improve the water resistance with Greenland wax or whatever is your chosen preparation. Best of all, it's a reasonable price, compared with some of the better known brands favoured by the bushcraft community. It may not be the insulated garment of choice as I reckon layering gives you a far more versatile set-up but I have been incredibly impressed with it so far and recommend it on the strength of that.
As ever, I've no association with Helikon Tex but I am one seriously impressed customer!