In science fiction movies, we often see a spaceship equipped with a tractor beam being able to stop another spaceship dead in its tracks, sometimes pulling it in closer to be captured. Let's apply this analogy to the ideal traction for wading in a river. Traction like this would be more than ideal, it would be amazing. While we can't say if there is a wading boot, which can hold you on any and every surface with such force we may have found one that comes really close.
