This black t-shirt features a humorous graphic design. It shows four stylized penguins and the witty saying '3 out of 4 voices in my head want to sleep, the other wants to know if penguins have knees'. This tee is made from a soft fabric. The comfortable crew neck and short sleeves make it perfect for casual wear. Wear it to spark conversations and show off your unique sense of humor. Ideal for everyday use. This shirt is bound to be a favorite in your wardrobe.