First time caravanners

Having started in tents and progressed to a trailer tent, we decided that we wanted to be able to camp whatever the weather, so decided to buy a caravan. 

We collected a new-to-us caravan last weekend - a 2007 Freedom Jetstream Enka. We are going to give it a good clean this weekend, in readiness for using on 1 August for a few nights.

The registration document and signage on the caravan say "enka". Does anybody know what makes it an "enka" - it looks like a "First class"?