Generals Weather-Breaker Door is 1-3/4 thick, constructed of polyurethane foam injected between two G-60 hot-dipped galvanized steel skins. This is a super-insulated door with an R-value of 16.4. It is available in white or brown. This is an obvious choice if energy conservation is a foremost concern, but the Weather-Breakers sturdy, solid construction makes it a good choice in a wide variety of applications.