For flying for adults who want a simple wired fit, the KZ ZST Pro Dynamic wins with a 3.5 mm plug, ergonomic in-ear design and passive noise control.
Choose Sennheiser instead if you want wireless listening with hybrid active noise cancellation and up to 50 hours of battery life.
• KZ ZST Pro Dynamic — best for a compact wired setup; pick this if your device has a 3.5 mm jack and you want in-ear headphones without a battery to charge.
• Marsno USB C — best for listening while charging; pick this if your USB-C device supports the adapter and you need a 3.5 mm audio port plus a charging connection.
• Marsno USB C — best for a similar two-port setup with a longer stated warranty; pick this if you want USB-C audio and charging through one adapter.
• Sennheiser Accentum — best for wireless listening and adjustable noise control; pick this if you want Bluetooth, hybrid ANC and a long stated battery life.
The KZ ZST Pro Dynamic is a wired, in-ear pair with a 3.5 mm right-angle plug and a 1.2-meter cable. Its listed design includes a rounded ear tip and an ergonomic fit. It is the most straightforward option here: there is no Bluetooth pairing or battery charging to manage.
For a flight, that simplicity can be useful if your listening device has a compatible headphone jack. The in-ear design offers passive noise reduction, meaning the fit helps limit outside sound without electronic noise cancellation. The listed frequency response spans 20 Hz to 20 kHz, and the product information identifies a dynamic driver. The specifications also describe bass-forward performance, which may appeal to listeners who prefer a fuller low end.
The trade-off is compatibility. The KZ has a 3.5 mm connection, not USB-C or Bluetooth, so it is not a direct match for a device without a headphone jack unless you have a suitable adapter. It is also listed as “without mic,” so I would not choose it for calls that require a built-in microphone. For adults who want wired in-ears and can connect them directly, I find this the most practical fit for the guide’s flying use case.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
This Marsno is not a pair of headphones. It is a USB-C adapter that provides a 3.5 mm audio connection while leaving another USB-C port for charging. Its built-in DAC handles digital-to-analog audio conversion, and the adapter is described as supporting Power Delivery charging up to 60 W.
That combination is useful on a flight when you want to use wired 3.5 mm headphones with a compatible USB-C device and keep the device connected to power. The adapter is described as plug-and-play and supports in-line remote controls. It can help bridge the gap between a USB-C phone or tablet and a wired pair such as the KZ, though compatibility can vary by device and headphone.
There are meaningful limits. It does not support data transfer, and the listed charging support does not include Quick Charge; Samsung Super Fast Charging is also not supported. The microphone function of Apple EarPods with a 3.5 mm plug is specifically excluded, and the adapter is not compatible with every device model. This is a useful accessory, not a standalone listening solution, so I would pick it only when the USB-C connection and charging pass-through solve a real problem.
Marsno USB C
The second Marsno listing describes the same basic job: a USB-C audio-and-charging adapter with a 3.5 mm headphone connection, a built-in DAC and support for Power Delivery up to 60 W. It is also described as supporting in-line remote controls and plug-and-play use. The main distinction stated in its listing is a 24-month warranty.
For travelers carrying a USB-C phone or tablet and wired headphones, its two-port design can keep audio connected while the device charges. That is particularly handy when a flight is long and you do not want listening to occupy the only USB-C port. It does not add wireless capability or noise cancellation; it simply adapts a compatible device to wired headphones.
The same compatibility cautions apply. Data transfer is not supported, Quick Charge is not supported, and Samsung Super Fast Charging is excluded. Apple EarPods microphone support is also not included, and some device functions may not work with particular models. Since this is an adapter rather than headphones, I would not treat it as a direct alternative to the KZ or Sennheiser. I’d choose it over the other Marsno listing only if the stated longer warranty matters to me.
The Sennheiser Accentum is an over-ear wireless Bluetooth headphone with hybrid active noise cancellation. It has deep ear pads, a soft-touch silicone headband and a lightweight ergonomic design, according to its product details. For a flight, the combination of wireless listening and ANC makes it the clearest choice for someone who wants to avoid a cable and reduce distractions.
Its stated battery life is up to 50 hours with Bluetooth and ANC on. That gives a traveler room for extended listening between charges, though actual battery life can depend on use. The headphones charge through USB-C, and the feature list includes a fast-charging function. A Clear Mode lets the listener hear surrounding sound without taking the headphones off, which can be convenient when listening for an announcement or speaking briefly with someone nearby.
There is also some control over the sound: the listed options include audio modes, Bass Boost, Podcast mode and a built-in five-band equalizer. The trade-off is that this is the only wireless, over-ear headphone in the group, so it is a different kind of carry and fit from compact wired in-ears. It also has no headphone jack listed. In my opinion, the Accentum is the better match for travelers who specifically want active noise cancellation and Bluetooth, while the KZ is simpler for people who prefer a wired connection.
We compared the published product features and specifications, including connection type, fit, noise control and charging details.
The ranking is our independent editorial opinion; no brand paid for placement.
The Sennheiser Accentum uses Bluetooth. The KZ ZST Pro Dynamic is wired, and both Marsno products are USB-C adapters for wired headphones rather than headphones themselves.
No noise-cancellation feature is listed for either adapter. They provide USB-C audio and charging connections; noise control depends on the headphones connected to them.
The KZ has a 3.5 mm plug, so it needs a compatible 3.5 mm jack or an appropriate adapter for a device without one. The Marsno adapters provide a 3.5 mm connection, but device compatibility should be checked.
The KZ is a wired in-ear option, while the Accentum is an over-ear Bluetooth model with hybrid ANC. Neither Marsno adapter is a headphone, so neither is a substitute for a headset marketed for cycling or sleep.
For headphones for flying for adults, I recommend the KZ ZST Pro Dynamic when a wired 3.5 mm connection suits your device; choose the Sennheiser Accentum instead when wireless listening and hybrid ANC matter more.
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