Altosy Sport Messenger Cross Body Outdoor Biking Sling Pack Backpack 8481 nylon Imported COMPACT. Folds into zippered inner pocket to fit anywhere. Unfolds from pocket to backpack. Must have on every trip. The backpack is made from highly rip and water resistant nylon fabric, provide strengthen and long-lasting performance with minimal weight. Stress points are reinforced with bar tacking for increased longevity. Durable 2-way Abrasion Resistant SBS Metal Zipper across the backpack. ULTI COMPARTMENTS. Features a classic shape with several pockets for storage and organization. This backpack has a roomy main compartment, 1 front zipper pockets to hold small accessories,a top and hidden pocket in the cap, and two side pockets for water bottle or umbrella. Dimensions Expanded : Unfold:21.65x12x7 inches, Fold:8.85x7.48x1.97 inches LIGHT WEIGHT(0.4kg) and ROOMY(35 Liters). A true space saver. Stuff the bag into its own pocket for storage---no extra fees, and unzip it when you reach your destination. Avoid overweight charges, simply unfold from your luggage and use it as a carry on for your excess baggage.