DETAILS THAT MATTER Made of rugged, water-resistant 600-denier polyester. Backpack glows at nighttime. Glow-in-the-dark powder needs to charge for approximately half an hour to glow properly. Glow lasts for approximately three to four hours. The glow effect will turn out to be weaker through the years as a result of the constant rubbing. All backpacks have adjustable straps that are contoured and padded to make sure a comfortable fit; padded back panel adds extra cushioning. Large and backpack feature an MP3 player pocket cutout for headphone cords. Exterior straps hold a Mackenzie lunch bag securely in place. Exterior side pockets are designed to hold the water bottle Large and backpack hold a lunch bag, a large notebook, two small notebooks, several books and a water bottle. Large Backpack Fits children who are over 48″ tall Overall: 14″ wide x 7.5″ deep x 17″ high Interior: 12.5″ wide x 6.5″ deep x 16.5″ high Exterior Pockets: 3 Exterior Front Panel Pocket: 8.5″ wide x 8.25″ high Exterior Side Pocket (2): 7″ wide x 7″ high Interior Pockets: 2 Interior Divided Pocket: 12.75″ wide x 10.75″ high Interior MP3 Pocket: 7.5″ wide x 5.5″ high Shoulder Strap (2): 3″ wide x 18–34″ long Carrying Take care of: 1.5″ wide x 6.25″ long Classic Lunch Bag Overall: 7.5″ wide x 4″ deep x 8.5″ high Interior: 7.5″ wide x 3.5″ deep x 8.5″ high Interior Mesh Pocket: 7.5″ wide x 5.5″ high Exterior Front Panel Pocket: 7.5″ wide x 8.5″ high Side Mesh Pocket: 5″ wide x 6″ high Carrying Take care of: 1.5″ wide x 6.5″ long Water bottle Overall: 2.75″ diameter, 7.25″ high Straw: 5.25″ long Fluid Capacity: 12 fluid ounces CARE Thoroughly wash before first use. Dishwasher protected. When washing remove the lid, straw, and silicone spout to make sure they get cleaned thoroughly. Not to be used with a microwave. Steer clear of liquids hotter than 122° F. Do not use with carbonated drinks as they may be able to cause the drinking spout to forcefully eject.