For those wearing Keen sandals...

[Crankin]

Same here. My winter riding is with Woolie Boolie Smart Wool socks, shoes, toe covers AND booties. And, I have been known to put a chemical heater in there, too.
If I am riding my hybrid, I have winter riding boots with cleats, but I even find them a little cool with the same wool socks.
I mean, I like my Keens, but for riding or walking around in sporty- type clothes, going to the pond. Definitely not work attire for me.

[Bike Chick]

I love my Keen commuter sandals and I do clip in with mine. They are perfect for commuting, running errands or easy rides. I don't like them for long rides or hills because the sole isn't stiff enough to get a good pedal stroke. I feel like my foot wraps around the pedal and standing to climb just doesn't work.

I've never washed my commuters but I have two other pair of Keen sandals and DH has a pair and I have washed all three in the washer with great success.

I love Keens. Period.

[Cataboo]

I have a set of waterproof windproof seirus socks (they might not be great for immersion) that I use with my keens (biking or not) so that I can use them in lower temps.

[Tri Girl]

our winters are cold. Sometimes on my commute to work it will be in the teens or single digits. I wear two pair of wool socks and don't have too many cold foot issues. Of course, that's a 30 minute commute- much longer than that and my feet would probably freeze off!!