Waterproof: outer selection of 600D fabric, 6MM anti-collision sponge layer. This fashion backpack is made of durable waterproof and dustproof nylon and oxford fabric to guarantee the quality, perfectly protect your belongings from rain, easy to clean. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.