I’m not going to claim that I have been terribly active as the temps have started lowering, even though the weather here in Michigan have been wonderful. When the air gets cool and before the snow falls I’m in heaven. Keep it at about 45 for me. I do try to go for a run on mornings when I can roust myself up early enough. While I enjoy the weather, getting up while it’s still dark is the real trick. What has been working for me to convert my Merrell Barefoot shoes to a warmer option is adding a thin tech-wool hiking sock. I chose a pair from Fox River Socks for my experiment. They are not bulky, have support seaming and do a nice job keeping my toes warm. While the shoes are designed to be work without socks it still fits well and doesn’t feel like the socks are affecting my comfort in the shoe. Josh has been wearing a very thin liner sock with his Barefoot shoes lately to help cut down on the smell.
Adding the sock does not make the shoes water resistant, so if you hit a puddle or any snow then your feet are going to get wet and cold depending on how long your run is. I’ve not had this issue yet but winter here in Michigan is just starting.
***This blog is not sponsored by or connected to Merrell/Wolverine Shoe company. I simply believe in the product and wish to share my experiences.***
The Roving Van Gelders 
Didn’t wear the barefoot(s) in cold weather. Tried socks, but couldn’t get any thin enough. Also spray mine with disinfectant after each wear. So far not too smelly.
XXXOOO Daisy, Bella & Roxy
Boy, you’re brave. I’d be looking for those boots with the built-in electric heaters! =)