these are great. glad I got them for trail riding with scott 89 series.. mounted right up. makes fighting the fog ups a lot easier especially when I end up on trail "detours" and start huffing and puffing.
I like having this set up so much more than just a strap.
I just cut my existing straps and used them.
I would buy it again. The only down side is having the goggles hanging down the side when not in use.