Personalized Keep Calm Polka Women's Plus Size T-Shirt. Funny novelty Polish music, German music, polka music, accordion lovers, polka band Women's Plus Size T-Shirt - Vintage Red with accordion graphic says KEEP CALM POLKA ON. Gifts for polka lovers, oompahpah, squeezebox players, polka bands and festivals. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40 combed ringspun cotton/polyester)