The Rion is lightly insulated so it stands up to cool weather on its own. The three layers of material ensure protection and warmth featuring an outer shell, lining, and insulation layer which have built-in stretch. The result is a layering staple that busy kids can move freely in._AriatTEK is designed for optimal comfort in any weatherWind and water-resistant construction with a breathable designPFC-free EcoDry finish repels water40g of Cool Climate Insulation for lightweight warmthThree-layer stretch construction for maximum freedom of movementStreamlined and clean designTwo-way front zip closure