Glenn Hall is generally thought to be the first goaltender to react to shots by dropping to his knees. This was remarkable because he did it without a mask. Other contemporaries, such as
Terry Sawchuk and
Jacques Plante (who, while not having invented the goalie mask, is credited with having popularized it) relied mostly on the
stand-up style. Plante actually tried the butterfly style when sharing goaltending duties with Glenn Hall in St. Louis, but cautioned others against its use except under certain types of screened shots. Hall's innovation was improved upon later in the 1960s and 70s by
Roger Crozier and Tony Esposito. In spite of their success, the butterfly fell out of favour until the emergence of Patrick Roy in the mid-1980s. This new, modern butterfly style has been referred to as the "profly" style. Prominent advocates of the "profly" progression of the butterfly include Canadian coaches
François Allaire and
Benoit Allaire. Many believe that the advent of the Profly style was made possible by improved, heavily armored chest/arm pads and more protective face masks. Prior to these advancements, goaltenders wore chest/arm pads made of felt. To avoid injury, goalies had to trap all pucks with their gloves. Modern, lightweight plastics and energy absorbent foams allowed goaltenders to block and trap shots with their bodies. Equipment designers such as
Michel Lefebvre (of
Koho and
Reebok fame), Michael Vaughn of Vaughn Custom Sports and the late Brian Heaton (of Brian's and Heaton fame) were at the forefront of the equipment advancements.
Patrick Roy worked with the Allaire brothers and used Lefebvre-designed pads and Heaton-designed gloves in the late 1980s to modernize the style. As in many arts, there is no universal agreement on style classifications with modern goaltending techniques. Modern hybrid coaches such as the late
Warren Strelow worked with goaltenders associated with the profly style such as
Miikka Kiprusoff. The butterfly is not a style but a save selection used by most goaltenders.{{cite news | last=CBC | authorlink=Canadian Press | title=NHL Goalie Coach Strelow was
one of a kind | url=https://www.cbc.ca/sports/hockey/nhl/nhl-goalie-coach-strelow-was-one-of-a-kind-1.690926 ==Contrasted with stand-up==