Brown's Garden Chic! Thistle Socks are ready to fill with thistle seed and hang. Thistle seed is the most desired seed of all finches and other small birds. Simply unwrap, fill with thistle seed, and hang to create a goldfinch feeding frenzy! Once depleted, loosen the drawstring and refill with more Brown's Song Blend Nyjer Thistle Seed! Each package contains two socks and each sock holds up to 13 ounces of thistle seed.