So, a friend of mine bought knee-high flat brown boots and after a few wearings, her knee-high boots became slouchy calf-high boots.

This is not an uncommon problem, especially if you wear your boots with tights and dresses. So, how to keep your favorite boots up so that they stay in place and flatter the leg? Velcro! Yep, add velcro to the inside of your boots (back of the calf works well) and voila, your boots will stay in place, attaching to your tights or leggings.