The McNett Aquamira Frontier Filter Pro is one of the smallest and lightest water filters you can get. The straw-style filters attaches directly to water bottles or hydration packs and a tube adapter and draw tube are included. Remove the bite valve to use this filter as hanging gravity filtration system. The pre-filter lengthens the life of the Porous Plastic filter with Miraguard technology to filter up to 50 gallons of water. You get all of the benefits of a larger bottle filter but in a compact, travel friendly size ideal for hikers, backpackers, cyclists and wilderness adventurers.