Function: Wear Resistance - The High-Quality material used in the backpacks have more textile threads per unit area, so it is tough and tear resistant.This backpack will last for many years, 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, Waterproof - Made with high quality water and tear resistant material. But please do not expose it to heavy rain for a long time,