Undershirt that provides an optimal fit in cold weather. - Brand: Under Armour - Size: M - Material: 87% Polyester, 13% Elastane - Model Name: Cold Gear Thank you for viewing. I bought this for my child, but it was only used a few times, so it's in good condition. It's a bit thick, so it's perfect for this time of year. Recommended for baseball, soccer, and all kinds of sports.