Material Safety: Membrane Solutions Reverse Osmosis (RO) membranes are made from 100% food-grade Thin Film Composite (TFC) material for ultimate purification performance, with high permeate flow and salt rejection, tested by an independent third-party to meet NSF/ANSI 58 water standards to ensure a reduction in contaminants, providing safe-clean drinking water. Healthy Drinking: Membrane Solutions RO membrane with a high 97% stabilized salt rejection rate. Hundreds of impurities are reduced by over 99% through the 0.0001-micron TFC membrane layer, including heavy metals (fluoride, calcium, magnesium, lead, colloids, chromium, and nitrates), organic materials, and harmful minerals, including other soluble salts found in water resources.