The Under Armour Kid's Cold Gear Longsleeve Compression Mock isn't your old-school mock turtleneck. But you knew that UA don't just make stuff that looks good, they make stuff that works harder & better. The sleek, dual-layer construction can be used to layer up or can be worn on it's own so you'll be ready for the weather's worst. The soft, brushed inner layer circulates heat, & an element-battling outer layer that keeps you dry & protected. The real game-changer, though, is the fit. The super-tight, second-skin fitted longsleeve squeeze of UA Compression activates your muscles for increased power. You'll know it when you feel it. Features anti-odor technology to prevent growth of odor-causing microbes & smooth flatlock seams to prevent chafing. Made from Nylon, Polyester & Elastane & suitable for machine washing., size 13-14 Y