All Under Armour® Apparel features a tagless design or tear-away tag with no left-over pieces. The Under Armour® Kids HeatGear® Armour Long Sleeve is our original performance baselayerthe one you put on first and take off last. So we made it extra comfortable by wicking sweat and stretching so you can move no matter what. 4-way stretch construction moves better in every direction. HeatGear fabric is ultra-soft smooth for extreme comfort with very little weight. Material wicks sweat dries really fast. Raglan sleeves. 100% polyester. Machine wash cold with like colors, line dry or tumble dry low. Imported. View Zappos.com Glossary of Terms Under Armour Kids HeatGear® Armour Long Sleeve (Big Kids)