This is the new Shimizu S-Pulse 2013 Home Football Shirt made by Puma.
Since the teams inception, the same colour combination for home shirts have been used each year. The colour scheme of orange shirts, shorts and socks was selected to reflect the famous local product of Shizuoka Prefecture; the mikan. (species of Orange)
The current bright orange hue, named S-Pulse Orange by the club, is the result of a gentle evolution from a more yellow/orange shade during the team's early years.