32 of 33 people found the following review helpful
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This review is from: Rear Mirror View Rearview Behind Spy Sunglasses Monitor (Office Product)
These glasses are awesome. These were purchased to use while riding a bike on the streets. With the glasses on they provide a clear view of traffic coming up behind you. I have tried other devices such as a helmet mirror and a small mirror glued on regular sunglasses but these other options did not work very well. You have a clear view ahead and a slight shift of your eyes allows you to see whats coming up from behind. They also come with a very nice hard case to keep them protected when they are not being used.