AKG K-518.

I love the AKG K-518 BLK edition, they are my new headphones for traveling, sure they can be a bit bass heavy but when one is outside that can be good thing.
They are not perfect so if you got a big head these will clamp hard on your ears, in fact that’s also the main reason why they isolate the outside noise so much, also these headphones have a huge and I mean huge cable so be prepared for that.
For 40€ these are great but grab them soon because they were discontinued.