Thanks to a lightweight suspension system, the Gregory Z30 Backpack keeps your gear comfortable on your back, so you can handle your day-hike or morning summit trip without feeling like you have a 50 pound safe strapped to your back. The Z30 daypacks framesheet supports your heavy loads, and a mesh back panel promotes airflow across your back as you heat up on the trail. A front zippered pocket and side mesh pockets hold maps, sunscreen, and snacks, and this Gregory backpacks front dump pocket keeps your rainjacket accessible. Stay hydrated with your water reservoir in the Z30 Backpacks hydration sleeve. Choose the medium pack when you need a little more space for your all-day adventures.