They all seem too heavy though. She only ever shivers when she is wet, otherwise she sweats bullets at the drop of a hat. I put a cooler on her once and it made her sweat even more!

I
could just bite the bullet and stall her when it rains, but she far far prefers to be out, she's been raised very naturally, so I prefer to try to keep things that way for her.
I have no clue what the thicknesses listed for the sheets mean. 600 sounds like a very big number to me, but maybe that's no thicker than my jogging shorts??