For day hikes or short trips to the city, the AC Lite 23 from Deuter is a reliable companion. The padded hip belt and adjustable chest strap distribute the weight well across your back. Even on warm days or during sweaty activities, the AC Lite 23 is very comfortable to wear, as your back is continuously ventilated by Deuter's Aircomfort mesh back. Efficient packing is made possible by the large zippered front opening. You can store your smartphone in a side smartphone pocket, allowing you to access it easily for a particularly photogenic view or when you need to check your route, without having to take off the backpack.