A pack of six filters with 0.1 micron pore size from Membrane Solutions.
The Membrane Solutions Straw Water Filter is a Backpacking Water Filter made by Membrane Solutions. As of May 26th, 2020, it costs $63.99 on Amazon.com. It's ranked #8 on our list of the Best Backpacking Water Filters of May 2020. We Recommend This Product!