The Smart Shield Max is our most advanced under-sink water filter, designed to deliver powerful filtration for today’s tap water contaminants without the cost or hassle of a whole-home system. Powered by our patented CoreXchange™ dual-layer technology, it combines advanced filtration performance with a simple DIY installation that connects directly to your cold water line. Enjoy cleaner, better-tasting water straight from your existing faucet with long-lasting performance you can trust. Powered by patented CoreXchange™ dual-layer technology Layer 1: Carbon-impregnated nano-fiber outer media helps reduce bacteria, viruses, cysts, VOCs, and microplastics Layer 2: Carbon fiber block helps reduce chlorine, lead, PFAS, pesticides, pharmaceuticals, and many other common drinking water contaminants Independently tested to NSF/ANSI Standards 42, 53, P231, and 401 Helps reduce chlorine, fluoride, lead, PFAS, pharmaceuticals, microplastics, bacteria, viruses, cysts, and many other contaminants found in drinking water 750-gallon filter capacity, providing up to 12 months of filtration for most households Simple DIY installation connects directly to your existing cold water line—no plumber required Fits neatly under your sink while delivering filtered water through your existing faucet Ideal for everyday drinking, cooking, coffee, ice, and more Includes one Smart Shield Max filter Includes one Smart Shield Max filter