ACT Trail 24
New for 2010 is the ACT Trail 24, a compact 24 liter top-loading daypack. Little brother to Deuter‘s award winning ACT Trail 32, the ACT Trail 24 brings all the popular features of the ACT Trail 32 and the woman’s specific ACT Trail 28 SL into a more compact size, making it a perfect summer day pack for a wide variety of activities. As with all packs in the Trail Series, the ACT Trail 24 uses the traditional AirContact back system, is compatible with our hydration systems, and comes with a rain cover.

From the Tahoe Mountain Sports.com Blog
One of the best features of the Trail 24 is the large two way zipper on the front of the pack that provides easy access to the entire contents of your backpack and especially the bottom or anything small and hard to find. This “clamshell” opening as it is referred to allows you to put the back down on its back and get a full view into and full reach into the entire main compartment of the backpack. It also has a mesh pocket on one side and a small zippered side pocket on the other, perfect for your map and compass. Ice axe and trekking pole loops secure gear to the outside, and a hip belt pocket keeps a small camera or other essentials close at hand.
Full ACT 24 Specs here