DOUBLE.B's colorful backpack set, made of durable nylon. - Brand: DOUBLE.B - Colors: Blue/Orange/Black - Sizes: Large/Small - Material: Nylon - Interior Colors: Black/Beige Thank you for viewing. I used the small backpack, so it shows some wear. It's light, cute, and holds a lot, so my kids loved it and used them as a sibling pair. The size is suitable for kindergarteners and children aged 1-2 years old.