Personalized 1st Dyngus Day Polish American Long Sleeve T-Shirt. My 1st Dyngus Day Long Sleeve T-Shirt - White with rooster design for celebrating this fun Polish American day after Easter holiday. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL