Fit system rollsys retention system construction in mold 2 layers ventilation 6 vents aquavent weight approx 400g m certification ce cpsc as build in lens magic buckle aquavent sunglass friendly earpads rollsys compared to the standard fit systems the lazer rollsys system is a fully integrated mechanism which surrounds the head completely by turning a smooth thumb wheel situated on top of the helmet the rollsys system permits an accurate and pro