Nappy bag versus backpack

I have yet to hear of a man's backpack being used for such needs. Unbelievable.
If you need a backpack of sufficient quality, I can advise you on this option: https://backpacks.global/compare/type/mens-backpack/ I'm sure it will turn out to be the most suitable medium than your husband's backpack. If you don't try it anyway, you won't lose anything, so be brave to new adventures, sister.
I am sure that you will find this helpful backpack because it is really high quality which I like exceedingly.