Guerrilla Knitting in Zurich

Yarn bombing, yarnbombing, yarnstorming, guerrilla knitting, urban knitting or graffiti knitting is a type of graffiti or street art that employs colorful displays of knitted or crocheted yarn or fibre rather than paint or chalk.

While yarn installations – called yarn bombs or yarnstorms – may last for years, they are considered non-permanent, and, unlike other forms of graffiti, can be easily removed if necessary. Nonetheless, the practice is still technically illegal, though it is not often prosecuted vigorously.[1]
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