Little by little, in the mid 1960, systems specially made for sport parachutes took the place of the military surplus systems. Parachutists started to call this activity skydiving and calling themselves skydivers. In order to improve the opening characteristics and to make them more maneuverable, there were a few sport modifications to military parachutes. A French Canadian kite builder, Domina Jalbert, developed in 1964 the the ram-air design, that has set the tendencies for parachutes in skydiving from then on.