The Evoc Explorer Technical Performance Hydration Pack carries everything you need for epic trail rides and overnight excursions. This 1830 cubic inch pack 30 liters easily holds your hydration needs, trail snacks, extra layers, smartphone, and bike tools. Its three liter reservoir capacity offers plenty of hydration for longer rides where water sources are scarce to non existent. Offering convenient helmet carrying, this pack also secures your XC or full face helmet while you take shuttle laps or dismount from your bike. Its main compartment features a reach through opening for easy access to internal items. There's also a bottom compartment for partitioning your layers from the pack's main contents. Plus, you'll appreciate the integrated rain cover, should you encounter a heavy deluge on the trail. Other functional carrying features include a dedicated sunglasses pocket, smartphone pocket, and tool compartment for storing spare tubes and small pumps. Helping you carry heavy loads without sweating profusely on longer rides, the pack's Air Flow Contact System features grooved ventilation channels and perforated EVA pads for plush carrying with enhanced airflow. The integrated sternum strap doubles as a signal whistle for added safety when you're riding on remote trails. Moreover, you'll find a wide hip belt that evenly distributes the packs weight, while carrying small items within the integrated hip belt pocket.