The majority of LifeStraw products for individual use are microfilters with an absolute pore size of 0.2 micron which remove bacteria, parasites, microplastics and dirt/silt. LifeStraw also manufactures ultrafilters/purifiers that in addition to the above contaminants, which also remove virus. The absolute pore size on these purifiers is 0.02 micron.
All LifeStraw products use a hollow fiber membrane technology. These membranes have microscopic pores that trap contaminants like bacteria, parasites and microplastics. Because these contaminants are bigger than the pores in the filter, safe water can pass through while contaminants like bacteria, parasites, microplastics and turbidity (particles in water like dirt, sand and silt that make water cloudy) are trapped.
Some of our more advanced products also have additional types of carbon filtration and ion exchange technologies that can reduce chemicals, like chlorine herbicides and pesticides, and some can also reduce heavy metals such as lead, mercury and other contaminants. To see a comparison of all LifeStraw products and their performance, click here.
For a more detailed technical description of each technology in use, visit our How Our Products Work page.