Good point. I looked it up. Slap Shot is from 1977. Helmets weren't compulsory in the NHL still 79/80. And that only for new players. Most were wearing the

Good point. I looked it up. Slap Shot is from 1977. Helmets weren't compulsory in the NHL still 79/80. And that only for new players. Most were wearing them by 78, in the NHL. Slap Shot is about a minor league, so probably a lot fewer wore helmets. Apparently some were still playing without helmets in 1996/97 !