PACKS FOR PARKS: A portion from every backpack purchase, will go directly to a National Park across the world! PRACTICAL: Weighing less than half a pound and coming in at only 7 inches. long when reduced. The Alberta Pack is the most practical daypack on the market. DURABLE: Made with both tear/water-resistant nylon, and YKK zippers, the Alberta Pack will be ready to combat any weather conditions. Don't worry, we even made sure to make the zipper lining water resistant for you!