Not sure what to have titled this. There's a soft, thin foamy bit in the earmuffs of my headphones that can come out. When it's out my ears have more space and it feels more like my headphones are open headphones than closed. Is there any reason that soft foamy bit is there other than looks? Do they protect from moisture? Sorry if this is a bit off putting but I walk 20 minutes in the heat (Australian heat) to school everyday so I'm sure my ears sweat a bit and I'm worried that if I take the bit out it could damage the speakers due to that. Here's a picture. Right in the centre of the speaker bit, the black wall, it can come out without taking off the entire earmuff.