Pi Equals Pie T-Shirt Medium Natural 100% Cotton 100% cotton (preshrunk), Ash is 99%/1% cotton/poly. This shirt has seamless double needle collar with double-needle sleeves and hem with a taped neck and shoulders. The design is printed with new age printing technology, direct-to-garment. It is printed with a water-soluble and eco-friendly ink. It is cured with a heat treatment process to ensure the color-fastness and lasting durability of the design. Designed and printed in the United States. This is not an unauthorized replica or counterfeit item. This is an original inspired design and does not infringe on any rights holders rights. The words used in the title and/or search terms are not intended to imply they are licensed by any rights holders.