<P> In association football, kit (also referred to as a strip or uniform) is the standard equipment and attire worn by players . The sport's Laws of the Game specify the minimum kit which a player must use, and also prohibit the use of anything that is dangerous to either the player or another participant . Individual competitions may stipulate further restrictions, such as regulating the size of logos displayed on shirts and stating that, in the event of a match between teams with identical or similar colours, the away team must change to different coloured attire . </P> <P> Footballers generally wear identifying numbers on the backs of their shirts . Originally a team of players wore numbers from 1 to 11, corresponding roughly to their playing positions, but at the professional level this has generally been superseded by squad numbering, whereby each player in a squad is allocated a fixed number for the duration of a season . Professional clubs also usually display players' surnames or nicknames on their shirts, above (or, infrequently, below) their squad numbers . </P>

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