I purchased all three items new from Uniqlo. All sizes are 100. The bottom part of the tags has been cut off for name labeling. The top two items are mainly cotton. The bottom item is Heattech. (Please check photos 2 and 3) These items were worn by one child for one season, so there is some wear and pilling. They are still wearable, but please refrain from purchasing if you are sensitive to these issues. Shirt, long sleeve Aeon Heat On