ADVANCED NANOMESH TECHNOLOGY: Removes up to 99.9% of contaminants commonly found in tap water. Targets 200+ contaminants, including bacteria, heavy metals, and mercury. Enjoy fresher-tasting water while protecting your health and well-being. GRAVITY-POWERED CONVENIENCE: Hybrid, 2-step design that filters your water without electricity, heat or chemicals.Perfect for emergencies, off-grid living, or everyday use. DURABLE EMERGENCY WATER FILTER SYSTEM: Designed to withstand tough conditions for clean water when you need it most. This cooler’s rugged build ensures long-lasting performance wherever you go. LONG-LASTING FILTRATION POWER: Each filter provides up to 200 gallons of purified water. Some contaminants get reduced at the claimed rates for even longer — up to 800 gallons. Save money with fewer replacements and more peace of mind. MADE IN THE U.S.A.: Proudly designed and manufactured in the USA for superior quality and durability. Feel confident in a product that meets high standards and supports American jobs. BUY WITH CONFIDENCE: Your purchase is protected from day one. We offer a 365 day return period, no questions asked. Your Patriot Pure NanomeshTM Water Filters use advanced technology for superior water purification. Used by NASA and the military, this "Rocket Science" targets 200+ dangerous contaminants. This helps fight things like bacteria, heavy metals, and mercury. You'll enjoy cleaner, fresher-tasting water no matter what. Each filter is certified up to 200 gallons by an ANSI-certified independent laboratory using NSF standards (up to 800 gallons for some contaminants).. With the ability to use up to 4 filters at once, you can maximize your water flow rate for any situation. Plus, filters are a breeze to replace – no tools, heat, or electricity required! Extra filters on hand means you’re always ready. When it’s time for a change, you'll still have safe, clean water. Made in the USA, and designed to deliver top-notch performance every time.