Tear-offs help you maintain a clean field of vision in muddy conditions. You can stack as many tear-offs as needed to increase your number of pulls. Running a single tear-off in dry conditions can also be beneficial as it helps protect your lenses from scratches. This can be especially useful for off-road riders who face trail overgrowth and loose terrain. Specifications: -Tear offs should be mounted so that the pull tabs are on the riders left side -For use with Fox Vue goggles only -20 pack included