After two rounds of returns and shipping, I'm finally satisfied.  I wear women's size 8.5, per the suggestions, I ordered a women's 9.  What arrived was a missed-matched pair of 9s, both were labeled 9, but one was obviously larger than the other (problem with QC).  I quickly sent the pair back in exchange for another set of 9s.  Yikes!  They were huge.  Frustrating!  Sent those back and ordered size 8s.  Finally, the 8s fit and I can wear thick socks with them and easily slip them off/on hands-free.

In the end:
- I wear 8.5, I need size 8, and they are slightly loose (that's how I like them).
- They are comfortable.
- They keep my feet warm and dry.
- I easily hose them off to wash
- Amazon has great customer service (this was a problem with the manufacturer)