Re: sewers: how to make extra newborn insert?
Depends on what kind of zorb. If it's the white felty stuff, it has to be sandwiched between layers of another fabric. So a layer of zorb sandwiched in layers of the obf would make a lovely doubler. If it's "zorb 2", which already is sandwhiched in bamboo jersey and has either a quilted or dimpled pattern on it, then you could just use it alone.
A full obf soaker is usually 6 layers of 16-22 oz obf. So if it's 500g, that's around 17 oz. 2 layers of obf are approximately the same absorption as one layer of zorb. So 4 layers of obf would be about the same as an obf/zorb/obf sandwich.