About the product: Size: 120 Material: 54% Polyester, 39% Rayon, 7% Polyurethane Color: Pink From the seller: Thank you for viewing. This is a Heattech shirt from Uniqlo. It's thin and easy to wear, and it's very convenient because it doesn't get bulky when layered. My child preferred to wear light clothing, so this was perfect for wearing under sweatshirts and thin T-shirts. Please note that there may be some pilling due to the nature of the material.