This is the adidas Third kit for the Brazilian football team Fluminense.
The all-orange kit has green details and its appearance changes based on the type of light it is exposed to. In natural light it has a light tone with the green features quite softly complementing the look; in artificial light - such as floodlighting - it is a far bolder orange and the contrasting green on the shirt, shorts and socks - including the Unimed sponsors - becomes very dark, almost black.
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The playing version of the shirt carries the Brazilian champions badge, as Fluminense are reigning domestic title holders.