[PORTABLE ULTRA LIGHTWEIGHT BACKPACK] This backpack weighs just 1 pound and conveniently folds into its own pocket for easy storage. When you need extra carrying capacity, simply unfold it. Its compact size of 11 x 10 x 2.3 inches makes it ideal for travel, fitting effortlessly into luggage or handbags. [MULTI-COMPARTMENT STORAGE] With a generous 40L capacity, this backpack features a versatile multi-compartment layout. It includes one main zippered compartment, a zippered front pocket, and two side pockets. Inside the main compartment, a divider and a small zippered pocket help keep your items organized. Perfect for carrying water, snacks, ropes, and tools, this backpack is designed for climbers and outdoor enthusiasts, making it easy to access all your essentials. [QUALITY AND DURABILITY] Constructed from durable nylon, this foldable backpack is water-resistant and tear-resistant (note: it is not fully waterproof). It features double-layer stitching for enhanced durability and a high-quality two-way metal zipper to prevent snagging. Experience smooth zipper operation with every use. [ERGONOMIC COMFORT] The backpack is designed with a thicker padded back and an ergonomic, breathable design. Adjustable, padded shoulder straps reduce fatigue during long hikes. An ergonomic loop handle provides added comfort, while the adjustable chest buckle ensures weight is evenly distributed for stability. [VERSATILE USE SCENARIOS] Ideal for outdoor activities such as hiking, camping, and traveling, this backpack adapts to your needs. Use it as a day pack for short trips or as extra luggage for souvenirs on your travels. [AFTER-SALES SERVICE] If you encounter any issues or have concerns with your backpack, please contact us immediately. We value your feedback and are dedicated to improving our products.