If not Down the filling is an Oil/Gas Byproduct. ethically, consumerism, it's a Lose-Lose Thing..
"Upper left coast" probably puts you close to Seattle Or Portland ,,
Go to their big REI stores .
You can ask them to recommend who can alter their Bags to make them Shorter to suit your needs.
I went with a More costly New Hampshire made bag , they do Custom work, but use Down..
for the bag filling and the insulation in the Airmattress.
'/,
Last edited by fietsbob; 01-11-17 at 07:32 PM.