Dynamats Spec. sheet says 2.0 lb/ft3
Looks like you got new fasteners or were able to re-use your push-in fasteners? Were they long enough for the 3/4" thickness? As it's adhesive backed, are the fasteners a 'belt and suspender' thing?
Yeah new fasteners, Wurth oem replacement. The insulation is pretty soft and flattens down easily. The adhesive on it is pretty strong but I imagine it might still come off eventually, so I used the fasteners too. I prefer how it looks with the fasteners as well.