An allover zebra pattern gives these roomy, rugged backpacks an adventurous feel. Made from rugged, water-resistant 600-denier polyester. All backpacks have adjustable straps that are contoured and padded to ensure a comfortable fit; padded back panel adds extra cushioning. Small, Large, and Rolling backpacks feature an MP3 player pocket cutout for headphone cords. Exterior straps hold a Mackenzie lunch bag (sold separately) securely in place. Exterior side pockets are designed to hold any of our water bottles (sold separately). Personalization is available for an additional $7.00. Mini backpack holds a snack, a change of clothes, and a favorite toy. Small backpack holds a lunch bag, two small notebooks, two books and a water bottle. Large and Rolling hold a lunch bag, a large notebook, two 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.