Woodlink Kay Home ProductS Thistle Mesh Sock Feeder These easy to use and refill thistle bags Mesh material that finches love to perch on allows birds to feed anywhere Fill with up to 1-pound of nyjer/thistle or other small finch food Nylon woven bag comes with adjustable locking cord which makes filling and cleaning easy Mesh dries quickly and is easy to clean away dirt and bacteria by throwing in the washer