The this t-shirt was inspired by one of the rarest and most unique collectible stamps in the world, the Inverted Jenny. When the biplane in this image was printed upside down, it instantly became a rare collectible. Nowadays they sell for around a million bucks, so check your granny’s love letters next time you are there. In the meantime you can pick ours up for a lot cheaper. Tri Blend 50% Polyester/25%Rayon/25%Cotton. Free Shipping in the USA!