Get the Gear. Get the Training. Be prepared to use it! Water Filter Bladder Designed to be used by hikers, hunters and outdoor enthusiasts. This 3L bladder can be inserted into any backpack that has a bladder pouch or can be carried on its own by the carry handle. Filters up to 1500 Liters Flow rate 55ml/min No Chemicals BPA Free Materials Removes 99.9% of contaminants Large Cap allow for a fast filling of the bladder Includes whistle, signalling mirror and compass Simply fill the bladder with any water source available using the Hi-Flow Pump with the Filter straw to filter the water as you drink or to fill up cookware. Turn off the shut off valve while on the move to stop water from leaking.