A blanket can be useful long before an emergency. The Woolly Mammoth Merino Wool Blanket, Fall Camping Blanket, 66"x90" Moss is the sort of extra layer I'd compare for autumn evenings at camp, a seat in the vehicle, or keeping within reach at a cabin.

The 66-by-90-inch dimensions give you something concrete to work with. Lay out a blanket you already own at that size and see whether it covers your shoulders and feet together.

Why the Flat Shape Helps

66-by-90-inch advertised size.
Merino wool description.
Moss color option in this particular listing.

A rectangle is easy to drape, fold, or share across a seat. You don't have to climb into it, so it's convenient for short periods of sitting around. That is a different kind of usefulness from a snug sleeping bag.

The Carrying Compromise

A large blanket takes up space even when you're only using part of it. I'd want the actual weight and folded size before choosing this for a long walk. In a vehicle, that same bulk may be a perfectly reasonable exchange for generous coverage.

Don't assume the Merino wording tells you the full fiber percentage or washing procedure. Verify the composition and read the care label for the exact blanket. A product name isn't a substitute for those details.

My Take

This makes the most sense when you want a wool-based blanket for regular use and have somewhere practical to keep it. If your problem is fitting a backup cover into a tiny pouch, a different format is easier to justify.

For overnight use, consider the sleeping surface and weather protection separately. I'd buy this for its familiar blanket comfort and stated coverage, then fit it into a complete sleeping or sitting arrangement rather than asking it to be the entire setup.