Military pieces, such as bomber jackets, are the ultimate piece of outerwear that combine heritage style with maximum functionality. However, the most iconic military jackets were traditionally built to withstand freezing temperatures in harsh environments or high altitudes, making them ideal for cold weather seasons but not necessarily for the spring and summer. In the 1950s, for example, the MA-1 bomber jacket was created with durable nylon on the outer shell and liner, and an insulating polyester fill; the most recent iteration of the bomber, the CWU-45/P, was also designed to protect against cold weather (the “CWU” in the name stands for “cold weather uniform”), with the nylon being replaced by a flame-resistant material called Nomex.
While the use of synthetic materials made these bomber jackets less heavy than their early 20th century predecessors, lightweight versions were still necessary for pilots to do their job in warmer weather. The L-2B bomber was issued to the US Air Force as a more streamlined version of the MA-1, with the removal of the inner pockets, and it was designed for use in moderate temperatures of 42-64 degrees Fahrenheit. It served as the standard summer jacket for Air Force pilots for many years. The CWU-45/P also comes in a summer jacket version, the CWU-36/P, which is also built for warmer temperatures. Both the CWU 45/P and CWU 36/P serve as part of the current military standard flight uniform.