Since you've not only gotten excellent advice from equally excellent voices of experience, but also made your decision, I'll chime in now.
1) I assume you're not in Texas.
2) Believe it or not, even a few Texans use shooting jackets.
3) But some of them are Texas transplants. At least one from Oklahoma; so "consider the source" of his advice.

4) Also consider the source of this information.

5) That said, I have a very heavy Grizzly Bear coat I'd make you a good deal on. Does a good a job of controlling wiggles.
6) Correction- tremors.

7) Don't use it much since moving to Texas.
8) From Mars.
9) Yes, we have Grizzlies on Mars.
10) But ours are twice the size of Earth Griz, which Martians call Mini Griz, or Toy Griz.
11) Martian Griz are popular lap-pets.