Nærbuxnaverksmiðjan ('The Underpants Factory') is a children's novel by Arndís Þórarinsdóttir, published in Reykjavík in 2018 by Mál og menning.
Climbing in through an open window, the duo explore forgotten sections of the building, discovering a large colony of rabbits in a fabric store, a dysfunctional robot called BlúnduRASS 3000, a community of anarchist teenagers revelling in the lack of a mobile phone signal, and a group of partying retirees hiding in the factory to avoid entering retirement homes.
Gutti learns that, no longer able to keep pace with the global underpants market, she has been unable to sustain the business, and that the factory is about to be demolished.
He rushes out to reason with the demolition crew, eventually forestalling their activities by slashing the tyres of one of their machines.
The story closes with a retrospective account of how Gutti, his grandmother, and Ólína succeed in winning official approval to turn the factory into a heritage and cultural centre called Rumpurinn.