This is a Uniqlo long-sleeved T-shirt. It's white with navy blue stripes. I think children who like simple designs will love it. The fabric is sturdy, so it should last a long time. It's 100% cotton, which is gentle on the skin. There is a small stain around the stomach area. There is also a slight blackening around the wrists. I think it's perfect for the coming season when it's cool in the morning and evening but warm during the day. How about it for use in air-conditioned rooms, or as a spare for elementary school or playing in the park? Please purchase only if you understand that this is a used item and has been stored at home. T-shirt American casual