Nashbar Ragster II Sandals. Cheaper than Keen's (almost 1/2 the price) and extremely comfortable for me. Use sockless when commute temps are above mid 50's F. Can use them with cooler temps with socks. When "cold", I'll put on enclosed shoes. I like the Nashbar's so much that I swapped out the road pedals on the road bike and replaced with SPD pedals. The commuter has the combination pedal: Platform on one side and SPD clippy things on the other side. Yes, my feet can still get hot on a hot day, but they don't feel bad. Love the air on the toes! Unlike the Shimano sandals, the Nashbars (and the Keens) do have a toe box, so your toes do get some protection. They are comfortable enough that I could wear them all day. Look for when Nashbar has a sale. Even at "regular" price, they are affordable.