It's easier to focus on learning when all of your school gear is organized. Both fun and functional, our rugged and roomy bags are packed with pockets, straps and gear loops to keep everything in place; fanciful dots, a pink ground and green trim add standout style. Made from rugged, water-resistant 600-denier polyester. Polyester interior lining. Mini backpack holds a snack, a change of clothes, and a favorite toy. Small backpack holds a lunch bag, 2 small notebooks, 2 books, and a water bottle. Large and Rolling backpack hold a lunch bag, 1 large notebook, 2 small notebooks, several books, and a water bottle. Rolling backpack features sturdy wheels and straps that can be stored behind a fabric panel when used as a rolling backpack. Small, Large, and Rolling backpacks feature an MP3 player pocket cutout for headphone cords. All backpacks have adjustable straps that are contoured and padded to ensure a comfortable fit; padded back panel adds extra cushioning. Exterior straps hold a lunch bag (sold separately) securely in place. Exterior side pockets are designed to hold our Klean Kanteen water bottles (sold separately). Personalization is available for an additional $7.00.