Katadyn BeFree Gravity 3L Water Filter purification Filtration Hydration bladderElevate your game and let gravity do the filtering with the BeFree 3. 0L water filter system from Katadyn. You can fill your hydration bladder with the included quick release hose kit. Easy to use: fill and hang the ultra durable HydraPak 3. 0L reservoir using the integrated Bail Handle & Carry Loop; filters up to an impressive 2 liters per min. Easy to clean: simply shake or swish the EZ Clean Membrane to remove debris. Collapsible 3. 0L reservoir