Very impressive effect and an interesting concept come together here. The classic Cardboard was me for it though but too fragile, so that the EVA Foam version of I AM CARDBOARD was elected. A Samsung Galaxy S5 fits easily clean (possibly even with Spigen protective case), the comfort is high. I have a few years ago stood in VR trainer systems, which was what time still permits with exorbitantly expensive systems can nowadays a common mobile phone. Alone it is worth such a spectacle.