For travel, buy a hard-shell case that fully encloses both ear cups. For a desk, a slim sleeve is enough. The only spec that genuinely changes anything is whether the case triggers the low-power state, and that turns out to matter less than the arguments about it suggest.
What the sleeve was actually doing
AirPods Max ship without a power button. Apple’s support documentation describes them dropping into a low-power state on their own once they sit still, then into a deeper state after a longer stretch of disuse.
The Smart Case triggers that first state immediately, using a magnet. A third-party case without the magnet means your headphones idle for a few minutes before doing the same thing themselves.
Battery drain is a real consideration, not a crisis. If you charge weekly, you are unlikely to notice the gap.
Hard shell, structured sleeve, or pouch
The headband does not fold or collapse, and that sets the floor on size. Every case for these is bulky, and anything advertised as compact is a soft pouch that will not survive a checked bag.
- Hard shell: EVA or polycarbonate, zippered, usually with a moulded channel for the headband. This is the one for flights and backpacks.
- Structured sleeve: padded fabric over a semi-rigid spine. Fine for a laptop bag you carry by hand.
- Soft pouch: dust protection only. Good on a desk, not in transit.
Details worth checking before you buy
Confirm the case fits your generation. The USB-C model changed the charging port, and cheaper cases are still cut with a passthrough opening shaped for Lightning. Street prices on third-party hard shells sit well under the first-party option, the same pattern that plays out in the AirPods Pro 3 case market.
Check whether the interior clamps the ear cups. The cushions attach magnetically and pop off with moderate force, so a tight lining can leave you fishing one out of the foam.
Look for a headband channel rather than a flat cavity. Flat cavities push the arms wider than they sit naturally, and over months that is what loads the hinge.
When they will not wake up in the case
A stuck low-power state usually clears with a forced restart. Hold the Digital Crown and the noise control button together until the status light flashes amber, then pair again. Treat it the way you would an unresponsive phone screen and reset before you assume the hardware died.
Apple has spent years trimming what arrives in the box across the lineup, a habit visible even in the reporting around the iPhone 17 design. Budget for the case as its own purchase and the question answers itself.
