The km cero jersey is dedicated to puerta del sol one of the most famous squares in madrids historic old town it has a wind rose inlaid into its cobbled surface which marks kilometre zero or the starting point for spains radial main road network this also works as a clever reference to the kilometre zero concept for line races the santini designed jersey is a mix of dark and light blue and features a motif comprising a sequence of zeros in red and yellow the colours of the spanish flag