Wraps

From CntWiki

Wraps are the waterproof part of a nappy system and are needed over flat, prefold and fitted nappies.

They may be made from PUL (a breathable material), fleece or wool.

The wrap does not have to be changed at every nappy change (unless dirty).

Wraps may fasten with aplix or poppers or (in the case of fleece and wool) may just be pull-on.