Filter Search Yarn is a tool where you can select multiple criteria in the left navigation bar. For example, you can select all wool yarn, color black, that is medium weight. Just check on and off in the left navigation bar to filter down the results you want. Find the yarn you are looking for more easily using this tool. Search criteria you can click on includes brand, color, fiber, softness, yarn type, yarn weight. You can only select one choice under each criteria and you need to uncheck it to select something else under that grouping.