Racing Optics X-Stack Tearoffs 5 Packs Racing Optics X Stack Laminated Tearoff System represents the latest and best product introduction to date from Racing Optics, the leader in motorsports laminated tearoffs. The laminated technology creates a distortion-free optical lens. The X Stack Laminated Tearoff System provides the following features: 10 Layers thick for long races, 3 more per stack than the Speed Stack 7 system. Better visibility than any other laminated tearoff system available. The worlds BEST tearoffs. More layers. Better visibility. Each package of Racing Optics X Stack Laminated Tearoffs includes 3 stacks of 10 tearoffs for total of 30 tearoffs per package. 5 Packs.