A thermal top is a winter essential, perfect for layering under clothes on those extra-cold days. crewneck long sleeves heat generation for circulation of body heat Quick-dri(R) fabric helps wick moisture away, keeping skin dry and increasing heat retention stretch provides mobility for training and leisure activities odor resistant fabric maintains original shape even after repeated washing Small (Size 4-6, chest 33.5-35"), Medium (Size 8-10, chest 35.5-37"), Large (Size 12-14, chest 37.5-40"), X-Large (Size 16-18, chest 40.5-43.5") polyester/acrylic/rayon/spandex washable imported