The LifeStraw Mission is a gravity-powered water purifier employing an award-winning technology that requires no chemicals, batteries or moving parts. The LifeStraw Mission gets rid of 99.9999% of bacteria, 99.99% of protozoa, and 99.999% of viruses. The larger capacity of the Mission filter is ideal for providing clean water to groups. Hang it at base camp for your next backpacking, boating, or car camping go back and forth. To use, simply fill the reservoir with the cleanest water To be had, fold the top to seal and hang the Mission from a sturdy strengthen. Gravity moves water down the hose to the filter’s advanced ultrafiltration membrane. Clean water exits through 0.02 micron pores in the walls of the hollow fibers, but bacteria, viruses, protozoa and other contaminants are trapped inside and are flushed out by backwashing. Compact, BPA-free roll bag reservoir features a wide mouth and is easily filled with source water from a stream or lake. Shoulder carrying strap makes it convenient to commute back to campsite. Includes drawstring stuff-sack for simple storage and carrying. Includes four extra pre-filter screens for simple on-site maintenance. Produces go with the flow-rate of 9-12 liters (2.4-3.2 gallons) per hour and will purify 18,000 liters over its lifetime. To be had in 5 or 12 liter sizes. Weight: 13 oz (5L), 15 oz (12L). For every LifeStraw product sold, one school child in a developing country will be provided with protected drinking water for a whole school year.