Moji sells changes their image. It is lightweight, thin, foldable and cheap with only 1,080yen(in tax)! It is only 49 grams, and the size at the time of the folding is W7xH7.5xD2.3cm.
You may think it to be like the toy loupe, but it support with Google Cardboard which is a standard of mobile VR of Google and users can enjoy 360-degree panoramic videos and VR application. Users can attach this to the smartphone of 6 inches. Lenses are 34mm, and the material of the body is ABS resin.