I figure if I'm cold so are they. I cringe seeing single coat dogs being walked without coats on.
That said if you order one online, make sure the place is reputable and that they will use signature confirmation, not just delivery confirmation.
Just passing that lesson on, as I paid $100 for a coat/pajama order back early Dec.(with someone well known) that was del conf only and am looking to be SOL it appears.
In the meantime I found some fido fleeces in a local store.