Outdoor Survival Water Filter Bladder Designed to be used by hikers, hunters and outdoor enthusiasts as well as excellent gear for a Bug Out Bag. 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 Litre 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.