Delta uses proprietary Fusion technology to remove harmful waterborne contaminants. The filter medium is composed of millions of nanofibers averaging 200 nanometers in size. The nanofibers are positively charged, providing foolproof interception of microbiological threats, down to the smallest virus. Tiny adsorbent particles are suspended within the nanofiber structure, with the ability to reduce chloramines, sulfides, toxic organic chemicals and metals, providing safe and delicious drinking water.