The Boys' Under Armour ColdGear Long Sleeve Shirt is a great option for an undershirt when playing outside! Highlighted by the dual-layer fabric, your child will love the soft interior and fast-drying exterior material of the Boys' Under Armour ColdGear Shirt. Plus, the 4-way stretch build allows for easy, carefree movement when your little one is outside playing. When looking for a shirt for your little one that is also comfortable and warm, we suggest the Under Armour ColdGear Long Sleeve Play Outside, Playing Outside, Cold Day, Sales Gifts, Little One, Long Sleeve Shirt, Long Sleeve T Shirt, Under Armour, Sleeve Shirt