 Yarn companies offer free knitting patterns for these caps.Originally started after the 2004 Indonesian tsunami, Knitters Without Borders is a charity challenge issued by knitting personality Stephanie Pearl-McPhee that encourages knitters to donate to Médecins Sans Frontières (Doctors Without Borders).Instead of knitting for charity, knitters are encouraged to donate a week’s worth of disposable income, including money that otherwise might have been spent on yarn.