MONMOB Vintage Laptop Backpack Unisex School College Backpack Fashion Casual Durable Travel Rucksack(Black) shell fabric made of high-quality wear-resistant nylon waterproof,durable and waterproof, lining: 210t polyester fibre cloth. adjustable straps 42CM/16.53"30CM/11.81"13CM/5.11"(HLW). weight: 0.78kg/1.71lb. make sure the size suit your need when you order. usb charging port design free your hands anywhere, say goodbye to carry power bank in your hand when charging your electronic equipment. unisex,back to school, fashion style backpack book bag, can be used for school, dating, shopping, traveling, outdoor sports, running, cycling, camping, etc.