Keep your CamelBak 2L Crux Hydration Reservoir Filtration Kit (not included) in top operating condition with the LifeStraw Replacement Filter Kit. Designed to filter all water coming out of the Crux reservoir, this filter system runs the reservoir's water through 2 complete stages of filtration before you drink. The system's Hollow Fiber Filter removes bacteria, parasites, and microplastics, while the Ion Exchange Filter reduces taste, odor, and chlorine. Enjoy clean and delicious water at home or on the go. Hollow Fiber membrane filters up to 4,000 liters. Ion Exchange filters up to 100 liters.Manufacturer model #: 2560001000. Replacement filter for CamelBak 2L Crux Reservoir Filtration Kit (not included) 2-stage LifeStraw filter system filters water coming out of reservoir Hollow Fiber Filter removes bacteria, parasites, and microplastics Ion Exchange Filter reduces taste, odor, and chlorine