I LOVE the Keen cycling sandals for biking. I do tris, and would never consider running in them even for the shortest distance. They are quite heavy, and do not have much give in them at all- and as such would make a terrible shoe to run in. Plus, you can't run in them because of the cleats (even tho the cleats are recessed and are OK to walk in, you sure wouldn't want to run in them). If you want a great sandal for cycling in the summer months, go with the Keens. They are super comfy and great for summer riding.