Polyester lining ✔High density durable material : This backpack is made of water repellent environment-friendly Oxford fabric for lasting durability. Lining material is polyester, it's wear resistang and anti-wrinkle. With two "S" curve padded shoulder straps to release your shoulder. It's a perfect and comfortable design . ✔Mulit pockets, reasonable storage: Totally 2 front pockets. The pocket can hold daily items like your keys、cards、wallet can easy take out.The other U-shaped pocket has 2 compartments,enough to fit for your ipad、notebook、power bank and nore your items. The side pocket has separate laptop compartment, size about 18"*11" c(Large size fits most 15" Laptop). Mesh side pockets to make sure taller water bottles and umbrella are secure. ✔Approx Dimensions: Backpack size:L12" x H21"x W7", Capacity :30 L,Weight :3.53 LB.The best choice for short trip or international travel and the best gift for women and men. ✔Multifunctional Daypack: --Including hidden shoulder strap and detachable added strap. Can be uses as BackpackShoulder backpackDuffle bacpackk, which offers a secure & long-lasting usage everyday & weekend, perfects for Traveling, Weekend getaways,Camping、Hiking、 Office work and other outdoor activities. As travel backpack for women and men. ✔KAKA SERICES: All of our bags will have double QC checking before ship out ,it have 1-YEAR warranty services. Any quality problems with your bag, please contact us, we will solve it.