They don't last as long as I thought!
At first, I was impressed with the fit and comfort of these gloves. HOWEVER... within the first 10 days of using these gloves, it already has a hole in one of the fingertips. After about 10 more days, most of the fingers now have holes.
I simply use them as an liner for downhill skiing. I don't use them for anything that would accelerate the wear on the gloves prematurely. I've had other glove liners which have lasted much much longer.