Traditional, neatly folding maps requires one to stop regularly, spread the map out, orient it the right way and then locate the right zone on the map that corresponds to the actual neighborhood, to find what you are looking for.
In contrast, Crumpled City Maps [pizzolorusso.com] proposes to use a soft, yet hard-wearing, waterproof material (Dupont™ Tyvek®) that is meant to be creased and crumpled. One can place a particular area on the palm of a hand to spot street names then just screw it up, stuff it back into its case or trousers' pocket, and carry on.
Currently in production, Pizzolorusso hopes to release the maps soon, which will include London, Paris, New York, Tokyo and Berlin.
Via Cool Hunting.