Do not write a lot: Because of the reviews on Amazon bought. And have not been disappointed. Sits perfectly and steam up (yet). The tone has now proven extremely especially in the outdoor pool in the sun is low. Have my glasses with -3.5 diopters brought both sides, ranging perfect, have otherwise -3.75 with mild astigmatism. There are no Wasserinbrücke. Looking forward to the next leap into the pool! Only downside: the Spectacles. They could have done really stable. But ultimately it does not diminish so the function of the spectacles, so still 5 stars.