【Lightweight & Waterproof】This Rainbow backpack is made of durable lightweight polyester canvas fabric with smooth zippers. Waterproof Canvas fabric can effectively prevent your items from water and rain. Easy to clean and Machine Washable. 【Convenient USB & Headphone Port Design】 With a USB charging port and headphone jack extended on the side of the backpack and built-in charging cable and headphone cable inside, provides convenience to charge your phone and enjoy audios, music while travel walking work,etc. Please noted that this backpack doesn't power itself, USB charging port only offers an easy access to charge. 【Stylish Design & Large Capacity】The casual daypack have Big capacity and abundant pockets inside hold laptop up to 15 inch, thick foam inside give your laptop best protection. With plenty of pockets to hold Laptop, cellphone, iPad, power bank, pen, keys, wallet, books, snacks, clothes, umbrella, water bottles and more.