Gaiters are funny. The word alone sounds like something only fishermen would understand, and does not seem like the thing runners would need. And yet, for those of us who have ever run in sand, loose dirt, dusty, dry loam, or any surface that might want to creep deeply into one’s socks, gaiters are a necessity. A couple years ago I tried out my first pair of gaiters before embarking on my first assault of…