Removes 99.9% of harmful Cryptosporidium and Giardia. The activated carbon reduces waterborne chemicals, organic contaminants, improves water taste and eliminates odors. Miraguard™ Antimicrobial Technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media. Easily slips into day pack, rucksack or travel luggage. The Frontier Filter allows you to drink from any water bottle, cup, WCU or directly from water sources. Filters up to 30 gallons.