Function: Waterproof - Made with high quality water and tear resistant material. But please do not expose it to heavy rain for a long time, Packable - Designed for everyday use or short travel adventures. It fits into an ultra-compact pouch. Easy to folds up into small pocket. So you can easily pack it in your suitcase for use at their destination as an extra bag for the trip, Ultra Light (UL) - This hiking backpack is super lightweight, great for reducing weight. It still provides a generous storage capacity, holding and organizing a wide range of necessities. Best choice for travel or daily use, Compact - This can be folded into its attached storage bag for space saving,