Don't skimp on the planning, because a day hike can turn into a miserable overnight experience with just one wrong turn. Lowe Alpine's AirZone Pro 35:45 Backpack can't make sure you stay on the right trail, but it can help you stay prepared when your short hike goes longer than anticipated. With up to 45 liters of space, it's on the roomy end of the daypack spectrum, and comes with an adjustable AirZone Centro back panel and AdaptiveFit hip belt to help manage heavier loads. It's still easy to use, though, with both side and front panel access, and it has multiple lash points, compression straps, and even a Spider Plate bungee system to help you carry extra stuff. There are also pockets to keep your phone, snacks, and water handy, a raincover, and even an ice axe loop and trekking pole carry system. If it's not enough for your hearty day trips, you're probably doing something, um, unusual.