Hhicker though.. gonna be harder to shape whatever... because thickness.
In Norway i do now get ordering 5mm foam locally who seems be similar with white paper both sides. But lighter than other foams easyer to get, who have a adhesive side, and som plastic coated aluminium on other side. (used for insulation on floors/ photos/posters) Much more expencive, and the layers on side of foam easy loosening. ..and the aliminiumcoat dont do it great for transmitt radiosignals... (needed remove)