100% cotton undershirt, size 90, soft and comfortable to wear. Warm long-sleeved underwear. It's sturdy, so I think it can also be worn as a long-sleeved T-shirt. - Size: 90 - Material: 100% cotton Thank you for viewing. As it has been worn by a child, I hope you understand. I have other items for sale as well. I will offer a discount to those who purchase multiple items. Please comment before purchasing, as I may not notice otherwise, which will make the transaction smoother.