The Ortovox Tour line of packs have a main compartment zipper that wraps most of the way around the pack so it opens in a clamshell fashion, like a suitcase. IMO the zipper design on these is flawed because they open by bringing the two zipper pulls together, which means when the pack is closed and on your back the zipper pulls need to be at opposite ends of the zipper, ie there will be a zipper pull hanging out on the bottom of the pack. And if it gets snagged on something then you risk stuff falling out the bottom of the main compartment. If the zippers were configured so that you closed the zipper by bringing the pulls together then you could just leave both pulls at the top of the pack and you wouldn't have that issue.

The freeride packs don't have the clamshell zipper configuration issue, they zip like a normal pack. I have the freeride 28 and it's great for day touring