The Sawyer S1 Replacement Filter SP4121 is an ideal choice for travel, hiking, and emergency situations. Thanks to its foam membrane and compatibility with SAWYER filters (e.g., Micro Squeeze 0.1 micron), you can get clean, great-tasting water virtually anywhere. The system reduces chemicals down to 0.5 ppb and pesticides down to 0.01 ppb, which is far below EPA recommended limits.
Combined with a 0.1 µm hollow-fiber SAWYER filter, it removes up to 99.99999% of bacteria (e.g., salmonella, cholera, E. coli) and the parasitic protozoa Giardia and Cryptosporidium. The silicone bottle with foam insert is lightweight, reusable, and easy to clean with the included accessories.
Main advantages:
