Not trying to bring back the whole debate on the boot band thing,
But,
With your pants being bloused it will do the following:
1. Keep your legs drier when going through low water levels, there for keeping your motivation up ( better to have dry legs and wet feet then be completely soaked)
2. With the black boot design, it does look more professional, especially in garrison with someone with real nicely shawn up boots.
3. When in the field, it keeps the insects ( mosiquitos, flees, tick, mites, and god knows what else ) from bitting your legs, which causes irratation, pain, and suffering, which lowers a soldiers morale, not to mention a soldier paying more attention to his or her legs is a less effective soldier.
I will also say, when i was in Afghanistan i did have my pants unbloused, when i had them unbloused during my driving stint it was great because it gets damn hot in the vehicle when your stuck in it not able to get out like the dismounts. But when dismounted then you have the chance of bug bites and everything else that can crawl up your leg, so i did my best to keep them bloused when dismounted.
And for anyone who has their pants ride up on them when there in a vehicle. Its one of 2 things:
1. You put too much of your pants in the blousing, or.
2. You need longer pants.
Just my :2c: