【Large Capacity Multi-functional Design】This 35L waterproof outdoor backpack is perfect for hiking, sports, and travel, offering ample space for all your essentials. 【Premium Durable Construction】Crafted from high-quality water-resistant and tear-resistant nylon fabric with reinforced stitching at stress points for long-lasting use. 【Foldable and Lightweight】The backpack is lightweight and foldable, smaller than a book after folding, for convenient storage and transport. 【Thoughtful Features】With reflective design, equipped with breathable mesh shoulder straps, a chest clip with built-in survival whistle, and side elastic bands for trekking poles, ensuring comfort and practicality. 【Versatile Storage Options】Features a spacious main compartment, internal zippered pocket for valuables, and two large mesh side pockets for water bottles or umbrellas. 【Travel-Friendly】Ideal for avoiding overweight luggage fees by unfolding it from your checked baggage and using it as a carry-on for excess items. Specifications: Capacity: 35L Material: Nylon Weight: 0.4KG (0.88 lbs) Folded Size: 7*6*2 inches Closure: Two-way metal zippers Bottom: Double-layered for added strength Suitable for: Outdoor travel, camping, hiking, day trips, and shopping