They are a nerf football with some thin rubber to stop it from flaking over it. The padding pieces are REALLY soft. The circuit pieces are a little firmer.
I made the rear piece big enough to be hollowed out for the MQ1 board.
It should fully encase it. You would have to hollow it out carefully with a razor or scizzors. I could probably made one that makes it hollow, but it wouldnt be very soft then.
The V2 are a little less detailed, so a little softer, but not as weathered looking.
The V3 are going to be real close to the riddell pieces. Im still working out the dimensions to make them fit perfectly in most helmets.
The pieces can also be trimmed thinner to go in smaller helmets.
About 1/4 inch on all pieces can be taken off without losing detail.
Hope that helps.
Im excited. Im going to paint the internal of the helmet soon, then they will really look good
ciao
Mason