Made with 600 Denier Durable Polyester Main Pocket Dimensions: 10" wide by 13" tall Front Pocket Dimensions:8.5" wide by 5" tall Two Side Water Bottle Holders Description Keep all of your Blippi gear together with the BLIPPI Backpack! With a large main zipper pocket big enough for books, coloring books, clothes and more as well as a small front zipper pocket to keep art supplies and other small items. Two side water bottle holders so you can always stay hydrated