there are alternatives, if you like your DX220 a little more low slung.
I post 3 here today.
1) EVA case measuring 16cm by 11cm by 4.5cm.
Has the most protection, though is also the most bulky of the 3.
Everything closes well with room to spare.
The elastic band holding the dx220 is slightly loose, but nothing that would jeapardize the unit.
If you're using a straight jack, it will need to be unplugged.
2) Draw string pouch in with double mesh (coarse outer and fine inner)
Very comfortable to hold. Lots of ventilation. Even the iems can go in and the drawstring
can be closed completely with no issues. Easily pocketable. There pouch itself
has a slightly spongy / compressible feeling.
3) Just a sponge type, form fitting pouch. The dx220 sits well inside completely with about
an inch of headroom/space left at the top. The iems will not be secure though.
Though it is also comfortable to hold and easily pocketable.
Of the 3, I like 2 the best, though I use 3 as well, but have to carry a separate iem case.
I use 1 for longer travels.
The total cost of all these 3 cases are no more than USD 40 and easily replaceable where I live