This aerogel has remarkable thermal insulative properties, having an extremely low thermal conductivity: from 0.03 W/(m·K) "Thermal conductivity" in Section 12, p. 227 in atmospheric pressure down to 0.004 W/(m·K) in modest vacuum, which correspond to R-values of 14 to 105 (US customary) or 3.0 to 22.2 (metric) for 3 inches thickness.