??Durable Material??The Large Rucksack is made of high quality waterproof oxford.The internal thick sponge velvet laptop compartment can effectively prevent earthquakes and protect your laptop. ??Large Capacity??Size of Laptop Backpack:18.1” x 11” x 6.3” inch.There is a big laptop compartment and a small zipper front pocket.It can hold your laptop,books,unbrella,magazine,macbook,ipad,clothes and others. ??Multiple Use??The Outdoor Backpack can fit your many occasions,perfect for traveling,hiking,camping,cycling,weekend getaways,dating and other outdoor activities. Also, it fits for college high school student when go to school. ??Unique Design??Waterproof Daypack has flap over snap with drawstring closure makes your contents safer,adjustable padded shoulder straps and top handle for carry comfortable.Mesh sponge elastic back pad is good for shock absorption and sweat absorption, perfect decompression. ??Quality Assurance??Our aim is to provide customers with the most comfortable service, so if you have any problems with our backpack, you can contact us at any time, we will solve the problem for you within 24 hours.