Newer filters boast .1 micron filtering, while this unit is .3. It seems that a more modern, .1 micron element should be available. Is it?

This unit actually has .2 micron glassfiber filter. You can get access to the white sheets for it here: http://www.katadyn.com/usen/katadyn-products/products/katadynshopconnect/katadyn-water-filters-backcountry-series-products/katadyn-hiker-microfilter/ - This unit produces good clean water but I've only used it in mountain lakes and streams. Would I use it for water from the river behind my house in Florida? No, absolutely not. But for backpacking it is great, light, compact and easy to use.

Does this come with a filter already? Or do i need to buy one separately?

It comes with a filter. Replacement filters are available, because they naturally wear out over time with use.

My main concern is filtering out harmful micro organisms such as giardia, Does this filter serve that purpose or does it only improve taste?

That is the purpose for which the filter was designed, it may not get viruses, but no filters really do. It will remove bacteria and Protista (giardia) an if you need to worry about viruses where you are camping you can boat treat the water with iodine drops or a UV light. But most places this filter alone will make the water safe to drink.

Does this filter remove viruses? oilecast

This is their claim. I have used this product all over the world. I have no complaints. v/rPATHOGENIC MICROORGANISMSPROTOZOA (AMOEBAE, GIARDIA, LAMBLIA, CRYPTOSPORIDIA)Animal single-cell organisms, 1 - 15 microns* in size, which like bacteria get into drinking water through animal and human fecesThese hard-shelled parasites form cysts, which lead to acute gastrointestinal diseases in humansCommon in unfiltered surface water. Have also been found in drinking water (Milwaukee, London, Sydney)A single cell is all it takes for an infection BACTERIA (E-COLI, SALMONELLA, CHOLERA)Single-cell organism 0.2 - 5 microns* in sizePropagate quickly in warm environments and particular in water,depending on the supply of nutrientsBecome dangerous if they are mixed together with human and animal feces in the drinking waterVIRUSES (HEPATITIS A, NORWALK VIRUS, ROTA VIRUS, POLIO VIRUS)Tiny parasites 0.02 - 0.2 microns*Can only propagate in living cells since they do not possess their own metabolismGet into drinking water through animal and human fecesNear populated areas, where wastewater can get into drinking waterA large number of additional pathogens are known besides the germs listed above. But according to the World Health Organization (WHO), their pathogenic (disease-inducing) action is only slight, or they are primarily absorbed along with food.

Brand	Katadyn
Special Feature	Portable
Product Dimensions	6.5"L x 3"W x 3"H
Package Information	Bottle
Installation Type	Personal Container
Power Source	Manual
Item Weight	310 Grams
Model Name	8018270
Maximum Flow Rate	0.95 Liters Per Minute
Upper Temperature Rating	1E+2 Degrees Fahrenheit
Supported Water TDS Level Maximum (PPM)	500
UPC	604375182707
Global Trade Identification Number	00604375182707
Manufacturer	Katadyn
Item Package Dimensions L x W x H	8.98 x 7.87 x 2.76 inches
Package Weight	0.53 Kilograms
Item Dimensions LxWxH	6.5 x 3 x 3 inches
Brand Name	Katadyn
Country of Origin	Chad
Warranty Description	Manufacturer Warranty
Color	One Color
Suggested Users	Unisex-Adult
Number of Items	1
Part Number	8018270
Model Year	2015
Style	Microfilter
Size	One Size
Sport Type	Multi Sport
Fishing Technique	Spinning, Casting

Katadyn 8018270 Hiker Microfilter Water Purification Unit

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