• Rugged Durable collapsible 1.0L Hydrapak soft bottle flask packs down small to fit in tight spaces (jacket pockets, purses, backpack, fly vests)
• 0.1 micron water filter removes harmful organisms like bacteria 99.9999% and protozoa like Giardia & Cryptosporidium 99.9%, surpassing EPA standards
• Ez-clean Membrane is simple and easy to clean by simply shaking or swishing the filter to clean debris, no backflushing or extra tools required
• Filters up to 1, 000 liters of contaminated water without using chemicals or other devices and hydrate quickly and easily with the free flow channels fast flow rate
• Stay clean drink nozzle keeps the mouthpiece clean and sanitary (replaceable with standard plastic water bottle caps)