Filters up to 1000 liters of contaminated water without iodine, chlorine, or other chemicals; does not require batteries and has no moving partsRemoves minimum 99.9999% of waterborne bacteria, 99.9% of waterborne protozoan parasites, and filters to 0.2 microns; surpasses EPA filter standardsAn alternative to iodine tablets and bulky purifiers, it weighs 2oz for ultralight portability, and has a high flow rate for drinking from the sourceComes in a sealed bag, perfect for storing in a bugout bag or other prepper gear supply kit; measures 9 x 1 x 1