The reviews of others are difficult to understand. People who actively snowboarding or skiing, thus doing a sweat should absolutely refrain from this bargain. The glasses fog clears quickly and unfortunately unlike designer glasses not being able to see fast enough to sensibly. Especially when it's snowing and it is wet, it is better to choose a different brand. In fine weather without welding activity in snowplow down the hill (without sweat) should somehow work but everything else ... well. And complete does the glasses by their distinctive square shape now absolutely seamlessly with a variety of helmets. Conclusion: rather invest a few euros more and buy a brand glasses. It is far from certain, if it goes down the mountain flying blind.