How to assess down jacket durability and warmth?

Heyo!

I'm unfortunately pretty hard on my gear. I've got an OR down jacket that I love, but it's not as warm as I'd like and it's probably 25% gear tape at this point...

How can you assess the durability and warmth of a down jacket when buying online? I checked reviews and am finding them lacking.

Google around too see if you can find the total down weight in the jacket. 

Yeah total fill weight and fill power (a given weight of down will be more insulative if the fill power is higher) will determine the overall warmth of a  down jacket.

Total weight tells you something if you can’t find the full weight, but adds in some other variables (mainly how heavy and how much fabric and zippers there are)

edited to add: seb is spot on below re durability. 

Fill weight but really you want to find the fabric denier. A 7d face fabric on the ghost whisperer will be exponentially less durable than something like a pertex classic(40d).

Everything else being equal, warmth is going to be proportional to the thickness ("loft") of the garment. Sadly though, everything else is never equal. The placement and number of sewn through seams can have a big effect. As for durability, the heavier the fabric, the better it will withstand abrasion, snags, and other affrontery.  I think the jury is still out on whether high power down e.g. 900 in/oz, will outlast or withstand moisture better than the equivalent volume (not weight) of, say, 650 fill down.

Thanks for all the info so far!  Is there a good blog post, review, or similar that will show me hoe the different fabrics compare for durability, or is the best bet to just Google each fabric type and read reviews, or find another jacket of the same shell fabric locally and go touch and feel it?

Jake Tarren wrote:

Thanks for all the info so far!  Is there a good blog post, review, or similar that will show me hoe the different fabrics compare for durability, or is the best bet to just Google each fabric type and read reviews, or find another jacket of the same shell fabric locally and go touch and feel it?

Every jacket will have the denier listed in the specifications, the only one otherwise is pertex which you can find out through a little Google fu.