Valgens Lightweight Travel Packable Backpack Handy Foldable Daypack for Camping nylon Unfolded size: 14.2x6.3x17 ", Folded size: 9x2.7x8.6 ". Roomy: 28 L Fold it back up, zip it closed into its own front pouch. Made of highly rip and water resistant nylon fabric, provide strengthen and long-lasting performance with minimal weight. Mesh back side, straps allows air to flow on your body and shoulders, keep dry and comfortable. Turn over the zipper line, no snag when pull zipper, cover it after pulling, take the effect of water resistant.