Helly Hansen's Juniors' Legendary Ski Pants features Helly Tech Performance construction to let our kids enjoy waterproof, windproof, and breathable weather protection on the slopes. They're also insulated with PrimaLoft Black Eco, which is highly breathable and tolerant of moisture, and feature an adjustable waist, gusseted crotch, articulated knees, and extendable length for a comfort, mobility, and room to grow.