Perforated Box - Pampers

You just need to follow the packaging requirements.
If a box is just a box, why would need a bag?

Aside from understand the requirements, you need to think, will this be ok on it’s own in the post?
If it is, then it should be fine. If it isn’t, then it needs additional packaging.

But are you quite sure that you can sell nappies at a profit?
They are very expensive on FBA fees, due to the size, rather than the weight.
Particularly Pampers, as you can virtually guarantee that Amazon are selling them as well.