A plain brown wrapper.

[PauliusOrigami]

first of all there are some kinds of krafts. ones are slick like some baking papers, and is suitable for a crumpling. Others are a bit rough (a very little) and quite thick (Not necessarily Heavy!), ant these ones poorly hold creases.. as my experience says. : )

So the thickness and weight of the paper should be not confused. Some papers may be very thin, but also heavy with a large gsm, or there may be thick paper but very light..