Sacha I have had a look at the grobag - maybe it is more of a sleeping bag I am not sure (we were given it as a present). It is definitely very light weight - like t shirt material and is made of 55% marino wool, 43% cotton and 2% nylon. It is called the original bobux and is new zealand made. There is a website address on the packaging (I am not sure if I can post the address) but if you google bobux I am sure it will come up. If anyone knows if I can post the web address let me know.

As I said I am not sure if it is a gro bag or a sleeping bag or if they are the same thing LOL????