Yes and no. It’s fluffy on the outside, but at the core it’s likely denser than our sun.

Yeah, but did you see the compatibility list? Disappointed I'll need to move to iPhone 5 or higher to use it.

Anyone know if I can use this to wipe a OnePlus 6 device?

I'd recommend flashing the cloth with open source firmware first. Otherwise it might check a signature in the glass, find that it's non-Apple, and become scratchy.