•Dermatologist tested •Only compatible with the filter baby skincare faucet filter 1.0 •The Filterbaby Filter Replacements sits inside your Filterbaby system and needs to be replaced every 90 days. Our filter contains best in class, multi-step filtration that removes contaminants as small as .1 microns. Don't backtrack your progress! •it’s brand new filter replacement (you need to buy or own the faucet filter from there website)