On a job this summer that was planned to be mostly shots on trails, the director added several beach shots. This was a great lesson in the treachery of mesh trimmed running shoes. Brooks running shoes are great, I've been running in them for years. I wear a motion control stability model. The mesh keeps my feet cool on long summer runs. The mesh that lets the shoe breath also allows them to inhale an amazing amount of sand that seems to collect in the toe box. In a very short amount of time each shoe collected about a half cup of sand.
Lesson learned. Desert boots next time.