Valgens Travel Packable Daypack Backpacks Hiking Camping Handy Foldable Backpack nylon Unfolded size: 9.8x4.3x15.7 ", Folded size: 6.7x6.7x1.5 ". Roomy: 15 L Flip backpack inside out, stuff the entire bag back into its own inside small pocket. Made of highly rip and water resistant nylon fabric, provide strengthen and long-lasting performance with minimal weight. Mesh straps allows air to flow on your shoulders, instead of the straps causing sweat. Stress points are reinforced with bar tacking for increased longevity. Durable 2-way Abrasion Resistant YKK Metal Zipper across the backpack.