Microplastics are generally smaller than 5 millimeters. That’s about the size of a sesame seed. But the really nasty ones are nanoplastics—so tiny they slip through your regular Brita like a thief in the night. So what’s a thirsty human to do?
You need a filter that catches 1 micron or smaller. A micron is 1/1000th of a millimeter. Yeah, it’s tiny. Think of it as the bouncer at the club who only lets in water molecules and kicks out the plastic party crashers.