Good pair of headphones
Zagula spells trouble: Headphones. Zagula is on the headphone hunt as I was not too long ago.
As usual, it depends on what you want and where you want to use them. Presuming, this is mainly for the airplane. There are the echo cancellers like the Bose which a big a bulky. Turns out you get much isolation just by physically blocking, so I used these things from a hearing aid company called Etymotics. See "headphones for plane flights":https://www.tongfamily.com/guide/000928.html