We use pre-shrunk heavy weight, 100% cotton t-shirts.* (ash grey is 99/1 cotton/poly; sport grey is 90/10 cotton/poly) Get quality and fit. These are true to size. Youth, adult, tall, super soft, heavy duty, women's shirts and hoodies to choose from. Select styles available in sizes up to 5xl. Makes a great gift for father's day, mother's day, st patrick's day, christmas, birthday or any occasion.