Fencing is a sport that involves two opponents competing with swords. The four weapons used in fencing are sabers, epees, swords, and foils. Sabers are curved blades with a single cutting edge and are used to score points by striking the opponent's torso. Epees are heavier than sabers and have a V-shaped cross-section. Swords are similar to sabers but have a straight blade and are used to score points by striking the opponent's head or arm. Foils are the lightest of the four weapons and have a rectangular cross-section. They are used to score points by striking the opponent's torso.