Set of two! The blue one has a stain on the pocket? Hardly used! Anyone want them? (∩´。•ω•)⊃ Here you go! Outer Material: 800D Nylon Closure Type: Zipper About this product: Ultra-lightweight fiber: Made of durable ripstop nylon, it is highly water-repellent and very lightweight, weighing only about half as much as backpacks generally available on the market. Suspension System: The Aircomfort suspension system (lightweight steel frame suspension) prevents direct contact between the backpack and the back, providing a comfortable feel. It also increases the breathability of the backpack, allowing for quick heat dissipation. It reduces sweating by approximately 25% by reducing the load on the body. Highly breathable straps: The uniquely three-dimensional shoulder straps, curved in an S-shape, are breathable and have excellent anti-slip effects, effectively distributing the burden on the body. In addition, the waist belt allows you to secure the backpack to your body's movements, preventing fatigue. You'll be able to enjoy the ultimate comfort. Various uses: Can be used in various situations to suit your lifestyle, such as hiking, mountain climbing, travel, shopping, and commuting to school. Excellent product structure: With a capacity of 25-28 liters, it has multiple storage compartments, allowing you to put various items in it, and side pockets and attached straps make it even more convenient. With this, you're all set for a long trip.