I am not expert, but I love the first lite wool as base layers, and think it is a step above kuiu wool garments, IMHO. I don't rely on wool to keep me warm without bulk beyond base layers. I have been wearing the chama with a Labrador on top during the coldest of weather. One product that I have tried on from others is the superdown jacket from kuiu, and it is awesome. Not bulky at all and shines as an insulation layer, then with a light shirt or jacket of fleece over the top. Not too bulky, very warm, and not too noisy as long as there is a soft layer under and over. YMMV.