Takes me waaaaay back to 1986 when I was all of 20 years old and rode through France into Switzerland on my Harley Sportster (two up with camping gear ) and saw another Harley piloted/co-piloted by two French guys in American Football helmets.
That`s just a rebadged OSBE Tornado which in turn was a rebadged Lazer.
I`ve got one....see my Avatar.
It`s actually an open face helmet with a tinted inner visor and clear outer one.
The lower part is a rubberised 'chinguard' attached by press stud straps.