Make school fun for your little one with the best-selling trolley backpacks for girls featuring girls’ favorite cartoon characters. Mustard is a dull and dark version of yellow. Polyester Material, Fabric, Nylon Material and Polyurethane are the most commonly used materials for Girls Bags. Browse best sellers and new arrivals for your preferred material. Shop Mustard Bags for Girls from styles like Casual, Everyday and Occasion in a variety of colors and sizes.