A foil is one of the three weapons used in the sport of fencing, all of which are metal.
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It is flexible, rectangular in cross section, and weighs under a pound.
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As with the épée, points are only scored by contact with the tip, which in electrically scored tournaments is capped with a spring-loaded button to signal a touch.
The modern épée derives from the 19th-century Épée de Combat, and is the largest and heaviest of the three weapons used in sport fencing.
A foil fencer's uniform features the lamé, a vest, electrically wired to record hits in such cases.