looking for product for riding in groups and being able to make sure rider behind was staying with the group. Was tired of having to turn around. Did not want to add mirrors of any kind so this was an acceptable alternative. The mirror works well for briefly lifting arm to glance back and look for headlight. Found this safer and more convenient then having to turn all the way around. The lens provides a wide veiwing area so easy to catch glimpse of rider/headlight behind. item is plastic so it is light weight. Not sure on durability as used only a few times. Only feed back for improvement would be a longer strap with larger velcro area for more adjustability
For the money, you can't beat the usefulness of this mirror. This is the second one I owned. The first lasted through 3 different sleds and 2 different snowsuits. Many, many miles for the dollar spent.