These glasses are incredibly comfortable! Easy to adjust, we put them on his face and one is immediately ready to beat world records in paddling! Seriously, compared to competitive models, these glasses are super comfortable and perfectly sealed without having to make 36 adjustments. The tinted lenses are perfect for outdoors but are equally pleasant indoors. When removing the glasses, his face is very marked and the eye is not painful. In against part they fog up slightly, which is why I have made it 4 stars. I personally recommend them for any swimmer who favors comfort and waterproofing.