The installing took a little bit to figure out as the directions aren’t the best. Pues con el cuidado embalaje y la presentación tan chula es una pena que no vengan protegidas las almohadillas de viscoelástica. I dont know if thats an issue of the package being in shipment "limbo" for so long, or if it was due to bad seals on the bottle. Loveeee them ! 😀 En lo que se refiere al peso son ultra ligeros (4gr). There are 2 cables that are used to connect them both. This is very cheaply made and poor quality. Good if you know you know I ordered them and they came within two weekdays. Lastly, at the end of every winter, my cheap slippers are dirty, worn out and stinky so they end up in a landfill sitting there forever.