Thank you for looking! ☺︎ This is a long-sleeved T-shirt from Petit Bateau. The fabric is thicker than a T-shirt but thinner than a sweatshirt. My child wore an inner layer in the winter. ☺︎ The tag inside the clothes made my child itchy, so I cut it off (see photo 4). Please comment before purchasing if you have any questions or concerns.