Anti Theft ZipperDujiea 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 StrapsIt 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.Front Pocket with ZipFront Utility Pocket for small items to quick access,such as wallet, keys and other small items.Portable PocketsTwo side mesh pockets for easy access essentials,can hold water bottle and umbrella.Expandable Elastic Side Pocket Expandable elastic side pocket high elastic for easier fastening.Can place phone,umbrella and water bottles.