I have 2, they're quite heavy, bout 2kg which I would say is the only downside I think but I was always warm in them (but then I don't feel the cold too much). The bivvi part weighs next to nothing but annoyingly cant be used without the sleeping bag. the gortex on me bivvi has started to deteriorate a little. if you hold it to the light you can see pin ****** through it. I also used the 95bag when I was in the army and I thought the dutch was comfier, the lining is nicer too. warmth I couldn't comment on as in the army you always sleep fully clothed. ive slept in the snow in me 95 and in monsoons in the dutch and both were very weather proof.