If you need something small that still does the trick on your next hiking trip, then the Arc'teryx Pyxis 12 Backpack is a great option. It's made from sturdy N630p-HT nylon, and features a Spacermesh™ backpanel, making it both lightweight and capable of providing airflow when things get sweaty. Good things can come in small packages. The Arc'teryx Pyxis 12 Backpack is proof of that.
N630p-HT Nylon 6.6 plain weave
Weight 390 g/13.8 oz.
Volume 12 L/732 cu. in.
Low profile pack for hiking, travel, and multi-pitch routes