Sort:  

An umbrella?

Thats a very good guess but not the correct answer.

Is it a shower curtain?

It is hanging in the livingroom.

Is it a curtain?

Very good guesses @rndness222 !
In fact the picture posted in the quizz is a close-up of one of my favourite lamps. One cool feature is that it is foldable. I have attached some macro-photos below. Let me know what you think?

IMG_5745.jpg

IMG_5746.jpg