I've taken to using RG-174 for jumpers and etc here in my temporory rental situation. I have RG-174 jumpers with male BNCs on each and bought a bunch of adapters for BNC to SMA, PL-259, SO-239, etc.
I can run it through the window, it's easy to store and easy to run in the shack.
Yes, of course there is more signal loss, but at least it gets me on the air....and my feedline runs are 40 ft or less....the majority of the run is RG-8/U or similar, but the last 10 feet to the shack is RG-174!
These make for nice flexible light weight jumpers.