Go Well - Go Shell
The Shell referred to in this posting is a new camera housing made by the Peak Design people. It is intended to shelter your camera while it is attached to some of the other Peak Design holsters or docking stations - in their turn on backpacks or belts.
The literature on the packet says that it is available in small, medium and large to suit mirror-less, regular DSLR and flagship DSLR cameras. The example you see in the images is the small version holding a Fujifilm X-E2 and a Fujinon 18-135mm lens.
Perhaps not needed in Perth in the summertime, but remember that winter will eventually come and you will want to go where rain and snow are common. Be prepared.
Peak Design product range available online.