The Under Armour youth ColdGear mock turtleneck is constructed of Nylour, PolyArmour, and Elastane microfiber. This turtleneck is designed to channel heat throughout your body, keeping your child warm and dry during rigorous, cold weather activity. The classic compression fit mock is ideal as a next to skin layer during colder conditions to keep you warm and dry. Great for football, baseball, lacrosse, running, walking, hockey skiing, and soccer.