The physical properties of cardboard depend primarily on the type and quantity of fibres used. This criterion applies especially to rigidity, especially if the cardboard consists of several layers.
Live our virtual reality experience
Nowadays you just need a smartphone and a little cardboard to immerse yourself in a virtual experience. Go to the video, select the cardboard icon at the bottom right and insert the phone in a viewer (like a Google Cardboard) to start exploring ProntoPack in VR.
Video quality can be changed by clicking on the three dots at the top right of the screen.