Turns our 4 seater Max X3 into a 5 seater. I can already tell it will likely cause problems after a couple of hours, so some bandaids will probably be needed. We still recommend this bike seat and if it wears out we will buy another so theres a lot of shaking going on. Simple y sencillo. Las tablas son de madera, suficientemente resistente para tenis. Al menos este modelo que tiene varilla para ganchos arriba y abajo. I stupidly looked at the photos showing a regular foot symbol on the sandal. The wood is smooth and shiny. Theyre super super comfortable.