ÖKO Level 2 Replacement Filter OKO-RFL2


Uses the technology used in the International Space Station

ÖKO Level 2 Replacement Filter

ÖKO Level 2 filtration was originally developed for NASA and used in the International Space Station.  The water filter material is now available for consumer use in the OKO bottles.  This is the state-of-the-art water filtration technology.

The OKO Level 2 Replacement Filter fits both the 1000 ml and the 650 ml size bottles.   The filter capacity is 100 gallons.

In addition to a 2 micron pore size, the material utilizes a positively charged electro-adsorption (attraction and retention) process to draw and trap harmful agents much smaller than its pore size. Charge fields, activated upon water contact extend 1 micron each to virtually close the pore to any intruding agents. ÖKO level 2 filter lab tests using NSF/ANSI Standard 53 reflect removal of 99.994% of e-coli, 99.9999% of cryptosporidium and giardia lamblia, the most commonly found bacteria and microorganisms in lakes, streams and international water sources. A stack of over 400 such pores in the 0.8mm thickness of the filter create a “tortuous path” which a harmful agent would have to travel through in order to make it across the filter membrane.


Weight 1.1 ounces
Height 2.25 inches
Width 2.125 inches
Length 2.125 inches


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