The Windchill Boots Gtx Navy/Blue by Viking, votedBest in Testby a popular Norwegian consumer magazine, offers kids superior protection from the elements this season. Waterproof.Breathable.Warm insulated.GORE-TEX®.Wool blend lining for cozy warmth.High shaft and adjustable closure keeps out snow and slush.The spiky lugs and natural rubber sole provides excellent traction on slippery surfaces.Inner EVA midsole increases insulation.A toe bumper adds durability as well as protection for active children.Tried and tested, the Windchill is an excellent choice for playing outside during cold, winter conditions. Upper: Textiles and Other Materials.Lining: Textiles.Sole: Other Materials. Please note that when you purchase shoes for your child, you should select a size that is 1.5 cm larger than your child's foot. Wellies and boots should be up to 2 cm larger, for extra socks and insoles.