Pack it light and be ready. The ultralight Frontier Filter Straw is ready to protect you from cysts and chemicals when survival is on the line. The Frontier Filter Straw is certified to EPA and NSF/ANSI standards so you can trust the filter to perform as claimed. Weighing in at a single ounce, it takes up less space than a roll of pennies and doesnt cost much more either. It fits perfectly into pockets and packs. Find a fast moving stream or backcountry water source and you instantly have 30 gallons of life saving water.Features : Parasite Filter with up to 450 ml/minute flow rate Certified filtration for 30 gallons (over 110 L) Lightweight and compact 1 oz. portable protection Comes packaged in a zipper pouch that doubles as a water collection and storage unit Miraguard Antimicrobial Technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media Certified lead free to NSF/ANSI 372 BPA free, chemical free, and iodine free Filter made in the USA