1. 5L Capacity: This hydration backpack has a generous 5 liter capacity, offering enough space for your water bladder and additional gear. It's suitable for long runs, hikes, or bike rides when you need to carry sufficient water to stay hydrated during your adventure. 2. Material: Made from certain materials, this backpack keeps your water safe and protected from harmful damage, enabling you to enjoy your hydration without concerns about contaminants. It's a choice for health conscious individuals. 3. Built in Hydration Bladder: The backpack comes with a hydration bladder for convenient on the go drinking. It has a wide opening for filling and cleaning, allowing you to stay hydrated without pausing to handle water bottles. 4. Lightweight Design: Weighing just a few ounces, this ultra light hydration backpack is designed for comfort and easy use. You can wear it for extended periods without feeling weighed down, making it ideal for outdoor activities such as running, hiking, and cycling.