The bass is incredible. They are fabric so obviously not good for heavily wet weather but even if you did get caught in the rain I am sure they would dry quite quickly. What is the point of this thing?! At first to me these had a really bright sound signature. I wear a 10 W which is a European 42. Yo muy feliz con mi compra. Dopo un mese e mezzo di utilizzo uso lo in casa il rivestimento dell infradito si è scollato. I gifted these sunglasses to my wife and she loves them! Do not waste your cash on this. I bought the tuner for my 2019 Mustang GT primarily to add horsepower, improved gas mileage was not a concern so I cant comment on that.