Theyre okay. I bought thrse because the X4 came with standard lense guards and i was getting a glare. Im still getting a glare with these although its not as strong. Tbh I dont feel like these are a necessity and theyre the same as the standards which you get for free.

These lens guards have stayed put through lots of snowboarding. Great upgrade over the originals that fell off on the first day.

These are pure garbage. I took one off because yhese done seal at all causing lots of pollen and trash to get between the lenses. When i took it off it fell i put my foot out which it hit first. Then it struck the ground and cracked straight down the middle. They lasted one use and not one attempt at cleaning. What a joke. These will not protect your camera at all. And likely to cause issues with the amount of trash that can get between your lenses. I highly recommend spending the money on something different.

Work well with product and fit like a charm good value

I can't tell a difference between the "premium" and standard cover that came with the camera. The lens stays in place for walking around and doing normal stuff... HOWEVER, I am on my 2nd set of lenses since the last "premium" set vibrated off the camera! I have the camera mounted to the handlebars on my V-Twin motorcycle. The lenses were installed correctly, but came off in the middle of my 2nd ride with them. I am going to try some "hot glue" dots on the edges of the lenses this time to see if that prevents them from coming off. My friend, who has a near identical motorcycle, experienced the exact same issue. Unfortunately, these are the ONLY Best Buy option...& at $35 a pop, it gets expensive when they can just come off when you are on the road.... I would not recommend except there are no alternatives.