Crisp and clear are the first words that come to mind. The Lightshifter is the best combo of real technology and performance.
Bolle has been making incredible optics for years. The Bolle cycling line up has not ever disappointed. The Lightshifter is a distinct shift in the frame and nose piece. Instead of smooth traditional lines in the frame the ear pieces make sharp angles. This provides a precise fit under a helmet. The frame is light and sits comfortably. The Lightshifter is great for Road and MTB.
The lens has broader coverage than the typical line. The lens has a thin opening in the top that allows perfect ventilation and helps to prevent fogging. The Phantom Lens technology is amazing. Definitely the cleanest lens I have tested on the market. Absolutely amazing clarity. It is difficult to describe the difference in this incredible lens. The nose piece is on a multi adjustment swivel with a click. This allows for a premium custom fit in three different positions.
The ultimate test for most optics is to see how they do road biking, mountain biking, and running. I think trail running is where you get the real bumps that test the fit of any frame. The Lightshifter is great all around and is the lightest most comfortable oversized lens that I have ever tested.
Just see for yourself: