At first I thought it difficult to install considering the first one cracked and I thought this piece too fragile to really man handle. Mine cracked on the thinnest part of the lateral side of the piece. There's a few online reviews of people complaining this is hard to install as well. Not the case however. You have to, with your thumb, push the male piece out far enough so it will fit back in the female end. It won't break, the plastic is flexible enough. The whole piece though, unlike the original, moves up and down far more easier and freely once the replacement is attached. I actually didn't know it did that......but it most certainly does now. Not a bad thing however. All of this will make sense should you try what I'm saying.
Have not tested the effectiveness of this helmet yet but it fits so good! I tried on every helmet at three different shops and this one fit just right. Build quality is top notch, very breathable, easy to adjust, and it works well with goggles or glasses.
Fit can easily be adjusted with the roller on top of the helmet, and the retention system is evenly distributed and very comfortable. The helmet can be adjusted to accommodate a liner in cold weather. I use it for both MTB and road bike year round.
Do long hard pack gravel rides. Previously purchased cheap China look alikes. No comparison! Theres a reason things cost more. Quality of workmanship,materials used and how well thought out design of glasses for comfort and functionality. Lenses breath due to slits ,helping in fogging. Anti- slip nose piece and ear arm to hold fast. Did I mention these glasses are very light and sharp looking. This is a no brainer. Money very well spent