Those are great, we have a few. I only wish they would make some that are a foot or so longer... something like 82" x 60" would be so much better.Found this at Costco, light, warm & cheap!
The down is likely duck and not top quality goose like the Rumpl, but these are a good size and nearly as warm as the expensive blankets.
These live in our cars now and one on our bed, worth a try-
We have four of these (Double Black Diamond... Black Diamond is a different company) with no issues. Costco has a great return policy, just bring them back there.I bought 2 of the Costco blankets,the quality control of Black Diamond must be spotty,my blankets are garbage,there are areas without down.