The Fiamma F65S is a popular awning for the Promater vans in the US and the Ducato vans in Europe. Fiamma offers an optional Rafter Kit that fits in the center of the awning once the awning is extended out. This optional rafter can help to stop pooling water in the center of the fabric, although in anything other than light or moderate rain it is recommended to take your awning in. The Rafter kit can help reduce flapping noise from mild wind too, but it is recommended to take your awning in with moderate or high winds.
The additional rafter comes standard with the 4.0 meter awning for the 159" extended Promaster, but does not some with the 3.2 meter awning for the 136" wheel base or the 3.7 meter awning for the 159" non extended.