The density of the LifeStraw Peak Series filter membranes has been revised for improved flow rateWAS means better performance against sand and mud while maintaining excellent long-term flow. This extremely versatile filter is interchangeable and has a universal thread to make it as adaptable as possible to your entire equipment.Improved microfilter performance: Our revised membrane and custom backflush accessories provide better performance against sand and mud and provide excellent long-term flow.Ultra-compact, our newly configured filter is tiny but powerful and saves neither weight nor space. Compatible with the foldable crimping systems of the peak series, gravity water filter systems or as a stand-alone straw.The filters of the LifeStraw peak series protect against:- 99.999999% bacteria- 99.999 % of parasites- 99.999 % microplastic, silt, sand and turbidity- Pore size: 0.2 micron- Filters up to 2,000 liters (the filter does not allow water to pass through when it reaches the en