I ride year-round in Chacos (double up the socks when it gets below 20F) with some old MTB clips with "securi-clip" embossed on the rubber cages. I don't fasten them (already run enough stop signs as it is), but they're still good for some lift on hills when I think about it. These are my everyday walking sandals and everything is comfy. I've never had a scare yanking my feet out of the clips.