Purify water. Anywhere. At 10.9oz (309 g), the Ultralight is perfect for trekking the globe, outdoor adventures and emergency kits. Provides full-spectrum protection against pathogens (viruses, bacteria, and protozoa), particulates, chemicals and heavy metals. FEATURES [ONE PRESS] purification + filtration. No batteries, UV bulbs, chemicals, pumping, sucking, squeezing or prolonged waiting. Removes pathogens. Removes 99.9999% of viruses (e.g. Hepatitis A, SARS, Rotavirus); 99.9999% of disease-causing bacteria (e.g. E. coli, Salmonella); and 99.999% of protozoan cysts (e.g. Giardia). Improves health, flavor, odor & clarity. Filters particulates (e.g. sediment, silt), many chemicals (e.g. chlorine, benzene) and heavy metals (e.g. lead, arsenic). Fast & easy. Purifies drinking water in only 15 seconds (2 liters/minute). Purifier lifespan. Replaceable cartridge effective for 300 uses (40 gal/150L).