Mould
Boats packed away damp start to smell and can go mouldy. That does little harm to the fabric, but a lot to zippers.
According to the Packrafting Store, moisture doesn't harm the boat itself, but on boats with luggage zippers mould leads to hydrolysis and leaks. So after every trip, at the latest after 48 hours, unpack, dry open and air.
Sources and further reading
Research as of 13 Nov 2026. We have marked manufacturer information as such.