Anti Theft This backpack have durable metal zippers to secure your backpack from theft and long-lasting usage. The zipper is more slippery than other brand and is hard to broken. Adjustable Shoulder Straps It has uniquely designed padded shoulder straps to ease the pressure on the shoulder. The shoulder straps can be easily adjusted, making you no worry about hanging low or high on your back. You will not feel uncomfortable even if you wear it for a long time. Perfect Gift Great gift for birthday and holidays for your family members and friends who like fashion, casual. This casual stylish backpack can be used for school, going out, shopping. Portable Pockets Two side mesh pockets for easy access essentials, can hold water bottle and umbrella. Warranty Any problem questions about your backpack, just contact us, 24h online service give you the most satisfactory reply. Specification Material : - Material: Polyester material - Back: 1680D Polyester Size : 11.4"(L) x 15.4"(H) x 6.9"(W), lunch bag : 7.5"(L) x3.1"(W) x 9.8"(H), Pen Bag: 8.7"(L) x 4.7"(H) x 1.8"(W) Features This backpack have durable metal zippers to secure your backpack from theft and long-lasting usage. The zipper is more slippery than other brand and is hard to broken. Multifunction - It is a backpack for school, it is comfortable and helpful, You can not only use it to install the book, you can also use it to install learning and daily necessities, for example your cup or umbrella. - It is a backpack for travel, When you climb or hike, you can put some clothes or water in the bag.