Introducing our Multifunctional Backpack-Travel Bag, the perfect solution for all your travel needs. With a large capacity of 36-55L, this expandable backpack is made of durable polyester material, making it ideal for scaling and carrying heavy loads. The solid color design and polyester lining texture add a touch of style to its functionality. The air cushion strap suspension system ensures comfortable and easy carrying, while the available colors, such as leather film, green, khaki, black, and gray, give you plenty of options to choose from. Its large size of 50*33*18 (+6.5) cm, and small size of 48*32*18 (+6.5) cm, means you can fit everything you need for your travels, including a 15-inch computer. Get ready to travel in style and convenience with our Multifunctional Backpack-Travel Bag!