The foam on the inside is like a BRILLO pad!! Not on my caps. 15 bucks each, that's y. Look great though
It uses the same expanded large-pore flexible plastic foam inside as the Shure, and will not scratch the finish on the mics. It's a material used for filters and is actually more like a sponge, with pores too large and open to retain water. It only resembles a scouring pad due to the large pore size.
Although soft and compliant, the rubber cuff is more likely to cause a scratch due to it's grabbing tightly, but probably only if the surface is dirty or a bit of grit gets stuck in there.
The other thing about that kind of plastic foam found inside the Movo's (and the BAS, apparently) is that it is far less likely to degrade over time, and have tiny crumbled pieces attach to your mic diaphragm. That is a real concern with the type of foam found in most windscreens (and what's on the outside of the BAS).
I hope this is not too off topic.
I recently found, in a moving box forgotten far from home since the early 90's, three samples of "microphone" foam in two mic boxes... In one box was an AKG D12 on top of a grey foam pad that appeared to be intact, in the other was a Beyerdynamic M201 N in a pile of disintegrated black foam, with a black foam windscreen, in apparent good condition.
The protective foam of the M201 was of course unusable, sticky, in fine particles adhering everywhere including on the body of the microphone. But, for the M201's windscreen and the D12's protective foam, after a passage in soapy water, a rinse and a drying outside, in the shade, they were in perfect condition, some thirty years later...
All foams are not born equal!
I can't formally identify the foam windscreen of the M201. It is not the specific Beyerdynamic model, the WS101, longer, to cover the vents on the body of the mic (it is a hypercardioid). Maybe a Schoeps (or a DPA?) but the back of this windscreen is cut at right angles and not "rounded".
Both microphones work well.
N.B.: The M201 still had its individual frequency response curve in the box, i.e. the paper strip directly from the B&K meter, as was the custom at the time... Matching number, of course!

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