Ozark Trail 28L Atka Hydration-Compatible Camping Hiking Backpack. This backpack is designed for outdoor activities like camping and hiking, featuring: Capacity: 28 liters, providing ample space for gear. Includes breathable mesh shoulder straps, a padded back panel, and a sternum strap for comfortable wear. Design: Lightweight and packable, with a cinched main compartment and side water bottle pockets.