I am very happy with this purchase. The nose piece stays in place, because it is on the lens itself. My old pair of Tifosi sunglasses had a pivoting nose piece with a screw in the middle which moved during my ride. These sunglasses are great during low light or cloudy rides. However I did see complaints that the fototec glasses did not get dark enough during bright sunny days. I found that NOT to be true. I did not squint at all when bright outside. Comfortable easy adjustable fit even with a headband under my helmet.
This is my second pair of Tifosi Podiums. They work great keeping out wind (I wear contacts). Also, these tend to run a bit narrower than many sunglasses, and that works well for me also.