100% CottonMachine washSuper soft – Our short sleeve t-shirt is a classic cut 100% cotton tee that is super soft and comfy, just like a great shirt should be. Machine wash.Options – Shirts for you and your sibling? Or maybe just you? But then your sibling will want one, too. Best (and funniest) when worn by two brothers, two sisters, or a brother-sister team. Available in Brother or Sister style as either a classic fit unisex t-shirt or a warm and cozy crew-neck sweatshirt (each sold separately).Sizing and care – Navy Blue. Sweatshirt is 50/50 cotton blend, T-shirt is preshrunk 100% cotton. Unisex sizes Small, Medium, Large, XL, 2XL, and 3XL. Printed in the USA on quality shirts.Classic styling – The crew neck t-shirt is a classic: short sleeves and a roomy unisex fit. Hilarious shirt reads Mom didn’t raise no dummy, and if she did it was my brother.Makes a great gift – The perfect present for brothers and sisters who have a friendly and good natured sibling rivalry.