LifeStraw Peak Series Personal Water Filter for Hiking, Camping, Travel, and Emergency Preparedness, 1 Pack, Mountain BlueProtects against 99. 999999% of bacteria (including E. coli, Salmonella), 99. 999% of parasites (including Giardia and Cryptosporidium), 99. 999% of microplastics, silt, sand, and cloudiness Enhanced microfilter performance helps to reduce clogging from sand and silt for better flow rate Ultralight and durable, pack it anywhere for your backup hydration, emergency, or on the go needs Extreme durability: premium materials make it tougher and ultra leak