In association football, kit is the standard equipment and attire worn by players. The sports Laws of the Game specify the minimum kit which a player must use, footballers generally wear identifying numbers on the backs of their shirts. Professional clubs also usually display players surnames or nicknames on their shirts, Football kit has evolved significantly since the early days of the sport when players typically wore thick cotton shirts, knickerbockers and heavy rigid leather boots. The Laws of the Game set out the equipment which must be worn by all players in Law 4. Five separate items are specified, shirt, shorts, socks, footwear, goalkeepers are allowed to wear tracksuit bottoms instead of shorts. While most players wear studded football boots, the Laws do not specify that these are required, shirts must have sleeves, and goalkeepers must wear shirts which are easily distinguishable from all other players and the match officials. Thermal undershorts may be worn, but must be the colour as the shorts themselves. Shin pads must be covered entirely by the stockings, be made of rubber, plastic or a similar material, and provide a reasonable degree of protection. The only other restriction on equipment defined in the Laws of the Game is the requirement that a player must not use equipment or wear anything that is dangerous to himself or another player. In the event of a match between teams who would wear identical or similar colours the away team must change to a different colour. The England national team plays in red shirts even when it is not required. Many professional clubs also have a kit, ostensibly to be used if both their first-choice and away colours are deemed too similar to those of an opponent. Most professional clubs have retained the basic colour scheme for several decades. Teams representing countries in international competition generally wear national colours in common with other sporting teams of the same nation, shirts are normally made of a polyester mesh, which does not trap the sweat and body heat in the same way as a shirt made of a natural fibre. Depending on local rules, there may be restrictions on how large these logos may be or on what logos may be displayed, competitions such as the Premier League may also require players to wear patches on their sleeves depicting the logo of the competition. The captain of team is usually required to wear an elasticated armband around the left sleeve to identify him as the captain to the referee. Most current players wear specialist football boots, which can be either of leather or a synthetic material. Modern boots are cut slightly below the ankles, as opposed to the high-ankled boots used in former times, studs may be either moulded directly to the sole or be detachable, normally by means of a screw thread
Pavel Nedvěd pictured in 2006 wearing a typical modern football kit
Modern turf shoes, which are designed to be used on hard artificial turf or sand.