Cruising along, it's nice to put your feet up, but that headwind can push your pant legs up, leaving your skin exposed to all kinds of hazards. Even if you don't get hit by a rock, the force of the air can chap your shins something awful. Protective gear doesn't do you much good if it doesn't stay in place. Boot clips are convenient and, for me, preferable to tucking my cuffs into my boots.
This clip, made by Ryder Clips, is simple. It attaches to your laces on one end and your pants on the other. The Reel Steel chain resists the pressing power of the wind and holds your pants over your boots where they belong.
Ryder Clips are perfect for holding rain gear in place. Made to slide over your pants, rain gear is often light and easily blown around. This can leave your boots filling with water if you don't secure those cuffs. I would have paid the $25 cost of these clips to have dry socks on more than one occasion.
While Ryder Clips come in a variety of styles, this one is of a theological nature. If you adhere to the Christian faith, then you already know the words in John 3:16. It's a pretty important principle of the belief, and you might want to carry that faith with you as you ride, as a reminder or as a higher version of personal protective gear. If that's not your cup of java, have a look at some of their other designs.