En mi punto de vista el woofer le da un efecto extra o sobrado, ya que ayida a dar efecto de vibraciones en explosiones, bajos sonidos, etc. I hoped these pads would help to reduce the pain. If I got the jumbo version I would have the mic come from above my screens. OK on tile or carpet. Soles are a little squeaky on indoor floors. Sure, I could push the heel cup down with my feet, but it felt awkward to walk on it. I 10/10 would recommend to others. No care or use instruction, but hey, theyre sandals. Further inspection shows the expiration is November 12, 2018. The flash for a moment as if they are installing, and "Finish" pops up, but nada.