COMPACT: This IdealTech backpack has an innovative design and folds into a small zipped inner pocket, and unfolds to a full-sized backpack in seconds. A true space saver and a must-have for every trip or daily activities. You may simply fold the backpack into its own compact pocket for storage to avoid excess baggage fees in travel, then unfold it at the destination. To avoid overweight charge, simply unfold from checked bags and use it as a carry on for excess baggage. DURABLE: These backpacks are made with high quality, lightweight and water-resistant materials, providing extra strength and longevity performance. The double-layer bottom piece offers extra strength and convenience to carry more load for your journeys. Heavy duty two-way SBS metal zippers are smooth and easy to operate from either side. Bar-tacks at major stress points further enhance the product longevity. VERSATILE: This backpack features one main zipped compartment, two zipped front pockets and two side pockets. The main compartment provides sufficient room (25 liters) for a day trip or a long journey. There are two separators in the main compartment to further organize items with convenience. The two front pockets are convenient to store small accessories with easy access. The two side pockets can readily hold water bottles, umbrellas or alike. COMFORTABLE: Breathable mesh shoulder straps with soft paddings help relieve stress from shoulders. The chest strap can buckle up to lock the backpack in place securely. LIGHTWEIGHT and SPACEY: These backpacks are constructed with lightweight yet strong high-tech materials and weigh only 9 ounces or 250 grams. Yet, they offer large space (25 liters or 1 cubic foot). Warranty: We strive for top-notch customer service and offer lifetime warranty to ensure 100% customer satisfaction.