White Zig Zag sneakers by Zadig & Voltaire. The sneakers have a leather upper. They have a padded collar, a lace fastening, a cushioned insole and a non-slip sole. – Upper: Leather.– 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.