Stay hydrated on any adventure with the High Sierra HydraHike 2.0 4L Hydration Water Backpack. Designed for hiking, biking, and outdoor exploration, this lightweight hydration pack holds 4 liters of gear and includes a 2-liter Bpa-free reservoir for on-the-go drinking. The top zipper allows easy access to the main compartment, perfect for storing a jacket or snacks, while a front zippered pocket with an organizer keeps smaller essentials secure. The adjustable waist belt ensures a snug fit during high activity. Simply remove, fill, and replace the reservoir, then bite down to drink using the leak-proof on-off bite valve switch. Stay refreshed wherever you go with High Sierra s HydraHike 2.0 Hydration Backpack!