No matter if you&';re in Peruvian mountain passes or high-traffic wilderness areas closer to home, Aquatabs water purification tablets quickly and reliably purify drinking water. Details EPA-approved tablets are effective against viruses, bacteria and Giardia cysts, providing safe drinking water in just 30 min. Ideal for ultralight backcountry trips, international travel and domestic emergency use Individually packaged, perfect for backing up your microfilter in an emergency 30 tablets treat up to 60 liters of water total Note: Aquatabs are not effective against Cryptosporidium Imported. Specs Best Use Backpacking, Travel, Emergency Preparedness