I have four Wiggy's bags and I probably will never buy another brand. They indeed keep you warm when wet; if you crawl into one wet you will indeed be dry by morning; and they do seem to exceed their temp ratings (NOTE: I'm a "warm sleeper".)

Construction is first rate and the single instance I had an issue customer service was all over it.

Standard disclaimers- I'm just a very satisfied buyer with no affiliation beyond that. I will also disclose that a letter I wrote to the company praising the products now appears in the testimonials page.
_________________________
“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman