String Theory is a feel good yarn shop in the western suburbs of Chicago. At String Theory we feature yarn from companies that are environmentally friendly and socially responsible: Manos del Uruguay, Be Sweet, Misti International, Imperial Stock Ranch, Blue Sky Alpaca, Mountain Meadows, Frog Tree, Be Sweet and more. We love color, so at any time you might find Malabrigo, Madelinetosh, Baah, Dream in Color, Anzula - but they arrive when they want to and disappear quickly.