I got a pair of the R5s on sale at a local shop. Best boots I've ever worn, feet have been toasty every session. I'm convinced wool is the greatest insulator on earth.
Why would your booties get dirty? Unless you walk to your spot from your house. I normally suit up in "my" truck. I also wash my accessories and suit after every use. You? ories and
I wear a pair of lava core socks under my 7 mil booties. i have bad circulation in my feet, tho. I am waiting for the technology they use in those thermolution shirts (flexible heating wires) to get used in boots and gloves. It is not a big step to run the internal wire down the leg of a wetsuit or sleeve and plug it into a boot or mitt. Ferchrissakes we've had this for motorcycle riding in winter for years!