All CamelBak packs are designed to take a beating, but none more than the K.U.D.U. The narrow-gauge counterpart to the K.U.D.U. 18, this pack is built for the enduro racer looking for a lightweight combination of hydration, protection and cargo. The flexible back protector panel absorbs over 94% of impact in a crash and is designed to handle multiple blows. The Impact ProtectorTM is made of flexible, lightweight foam that moves with your body, so you'll get the protection you need without feeling like a tank. And the wider waist belt and dual sternum straps keep the pack positioned securely.