[dtgriscom]

Isn't the neoprene air-containing foam, and it's the air that compresses? (Not that that negates your point...)

[itishappy]

Absolutely, but that air is still an integral part of the foam, right? I think it's fair to say they both compress.

Neoprene is a closed-cell foam. An open-cell foam (like a dish sponge) would not compress as air/water can just flow through.