2mm thick premium EVA foam designed to sit between the case and PCB in your Canoe case. Even though your keyboard is called a Canoe, adding this foam to it will not make it any more buoyant and should is not an approved flotation device for the user.
Had to trim a little bit of the foam
Decided to add case foam along with the plate foam I had already had installed in my E6.5. Same thing as the plate foam it needed a little customizing, but that was to be expected as this was not made for my specific board & I will not take points off for that.