LifeStraw Peak Activated Carbon Filter Attachment - Membrane Filter LifeStraw's Peak Series filter membrane density has been re-engineered for optimized flow rate - meaning better performance against sand and silt while maintaining great flow for the long haul. This highly versatile filter is designed to be interchangeable, featuring universal threading to make it as adaptable as possible to all your gear. Activated Carbon Filter LifeStraw's Peak Series activated carbon + ion exchange filter attachment protects against lead, mercury, chromium III, cadmium, copper and other heavy metals. In addition, it reduces chlorine and bad odors for improved taste. This highly versatile filter is designed to be attached to the LifeStraw Peak Membrane filter. Features COMPATIBLE WITH MULTIPLE SYSTEMS: Designed for seamless use with LifeStraw Peak Series collapsible squeeze bottles, solo water filters, and gravity water filter systems. REDUCES CONTAMINANTS: Filters out heavy metals including lead, mercury, chromium III, cadmium, and copper for safer drinking water. IMPROVES TASTE: Activated carbon + ion exchange filter reduces chlorine, odors, and organic chemicals, providing better-tasting water. LONG-LASTING: Each replaceable filter lasts up to 26 gallons (100 liters), offering extended use before needing replacement. LifeStraw is proud to be a B Corp and Climate Neutral Certified brand Your purchase has impact: one product, one child, one year of safe water