4 layers of fibre glass
1 layer of kevlar
4 layer of fibre glass

GY-GH7000
4 layers of fibre glass,
1 layer of kevlar
and an additional layer of kevlar on the chin and on the forehead,
4 layer of fibre glass,
the liner is Absorption Foam.

GY-GH8000
1 layer of carbon,
2 layers of fibre glass,
1 layer of kevlar,
2 additional layers of kevlar in the chin and in the forehead ,
1 layer of fibre glass,
2 layers of carbon .
the liner is Absorption Foam.