These socks look great in any backyard with Goldfinches on them. They also attract many other birds including Pine Siskins, Redpolls and Purple Finches. The draw string at the top helps to make sure that if your Nyjer sock is knocked down in a storm or high winds you don't loose the seed like other feeders. The Nyjer socks are 9" and 16" long and are made of nylon. They are designed to feed Nyjer only.
Image Courtesy of Songbird Essentials.™