Put out birdseed, and the birds and squirrels fight for the last nibble. But who will let you know when the seed is gone? The squirrel chatters, "Excuse me...your birdfeeder is empty." Pre-shrunk cotton-poly blend makes a soft fit that never changes. Seamless collar won't chafe. Double-needle stitched neckline, sleeves and bottom hem for durability. Heather navy 50% cotton/50% polyester. Sizes: M-XXL.