Personalized Polka Music Matters Long Sleeve T-Shirt. Funny novelty Polish, German, Czech polka dancing Long Sleeve T-Shirt - Charcoal with accordion graphic says POLKA MUSIC MATTERS. Gifts for polka lovers, oompahpah, squeezebox players, polka bands and festivals. 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