Carrying gallons of water isn't necessary when you have reliable water sources and are carrying this durable 11-ounce water Micro Filter in your backpack. A quick stop at a River or stream with the pump-action Katadyn hiker Pro water Micro Filter lets you continue on your trek with hydration packs and water bottles full of clean, clear drinking water. This field-cleanable Filter protector screen extends the life of the cartridge in challenging conditions the 0.2 micron glass-fiber Filter media is designed for high output with little effort. It connects directly to your hydration pack with 1/4 inch drink tubes and water bottles. Transparent design allows you to see the filtration working. Made in Switzerland.