Here are some quotes from their page.
"Using technology inspired by our own biology, the Sawyer PointONE filter system functions much like kidney dialysis does to filter out impurities in the water, leaving clean, drinkable water. This amazingly effective filter can be set up in five minutes. It requires only a 5-gallon container and the filtration kit. It is simple enough that adults of all education levels can learn how to use it. No electricity, no complicated maintenance... guaranteed for a lifetime of clean, safe water!"
"We continue to build our core ministry in Honduras, but thanks to our Mission Partners, we are also growing the Water Woman ministry in South Sudan, India, Nepal, Bolivia, Liberia, Kenya, Nicaragua, El Salvador, Haiti... currently 40 countries worldwide and growing! "
"Each filter kit from Water With Blessings is sent off with a little extra love in the form of a crocheted filter 'sock.' We rely 100% on volunteers (like you!) to help us crochet these protective covers."
Follow this link to see how to crochet or knit a "sock." http://www.waterwithblessings.org/crochet-for-a-cause.html