LEAKPROOF HYDRATION BLADDER: Included is a 2-Liter fillable water bladder; Durable, kink-free sip tube and push-lock cushioned bite valve; Large 2-inch (5 cm) opening for ice and easy cleaning.
GENUINE NATIONAL PARKS FOUNDATION: Highlight your preferred park using the sole completely genuine hydration backpack from the National Park Foundation.
SATISFY YOUR THIRST FOR ADVENTURE: Lightweight and comfortable; This hydration pack is a terrific companion for all your day-long or overnight hydration needs
CUSTOMIZABLE COMFORT: Backpack for men, women, and youth; Adjusts to fit all frames comfortably; Notched foam stabilizer and mesh covering means you can wear this pack for hours.