There’s a removable filter for the 5.25 and 3.5″ bays of
the casing

The removable and washable filter over the intake fan, it might
prove as a hassle though, as you’ll have to remove the entire front bezel before
you are able to remove this filter.

Adjustable buttons sliders on the first 5.25″ bays of the case, I’d say
well done Coolermaster! finally a perfect optical drive stealth solution found
on an after market casing.