With a starting weight of 3.13 pounds and measuring just 0.69 inches (17.6 mm) thin, the Tecra® X50 is the thinnest and lightest 15.6" premium laptop Dynabook has ever created. The laptop boasts an ultra-lightweight ToughBody magnesium alloy chassis in Onyx Blue–40 percent lighter than plastic—and a Honeycomb Rib Structure to provide extra durability.