The Under Armour Base 2.0 Kids Long Underwear Top turns up the heat when the temps drop. The mid-weight with thermal-grid fabric keeps body heat in while transporting moisture out. Let your kids be kids as they participate in winter adventures - you will be reassured that your precious one is toasty warm. This soft crew also neutralizes odor with Under Armour's Anti-Odor technology while the smooth Flatlock Seams deliver chafe-free comfort. [+]