Innershell Jacket - inside job

Someone asked me to clarify why the innershell is called the innershell;



It is called the Innershell as it is a windproof shell that is worn on the inside of a motorcycle jacket, hence InnerShell. Although it can be worn on its own as a windproof shell for other activities such as hiking, golf cycling etc.

The Innershell jacket is a very thin windproof shirt worn under a jacket, effectively a windproof liner. The advantage over other windproof shirts is that these are only 60microns thick and pack down very small so they can  be stowed away easily when not required.