Racing Optics tearoffs are a laminated tearoff solution for dirt and pavement forms of racing eliminating the need to apply individual tearoffs. The laminated technology creates a distortion-free optical lens. The XStack is a stack of 10 laminated tearoffs that are 2mm thick each. Each package contains 3 stacks of 10 tearoffs for a total of 30 tearoffs. Compatible with the BR1, Sport EV, and Sport helmets.