This is the new Colo-Colo 2014 Away shirt by Under Armour.
The black shirt with white trim can be worn with white shorts - as first choice - or with black shorts and white or black socks.
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The Chilean side, the first in South America to carry the Under Armour logo, will also wear the club sponsor of Cristal.
Weighing only 107g, and featuring quick-drying and HeatGear technology, the shirts are specially adapted for warm conditions, with a view to the players staying fresh and dry.