Ionwood Multi-Layered Engineered 100% Natural Wood Flooring is resistant to expansion and contraction due to its multi cross layered base rendering it extremely stable. Ionwood continuously 24 Hours Emit Negative Ion, Enhance Energy. It is Energy Certified by FFV12.5 (Healing Centre & Vital Energy) through Bioresonance According to Paul Smicth. Ionwood also Functions with Purifying Air, Eliminate Formaldehyde (EO System), Reduce Room Temperature, Far Infrared Ray, Stability System, Surface Protection, Scratch Resistance, Safety, Comfortable, Promote Blood Circulation, Eliminate Fatigue, Helps Prevent Blood Vessel Blockage, Normal Blood Pressure, Deodorizing, Breathe Easily, Antioxidant and Normal Red Blood Cells.