Reversible Fabric: only from Japan

Today I was looking at my new fabric from Japan (my Christmas present) trying to decide what to make from it when I discovered that both pieces are reversible. I was examining them and trying to figure out how the heck they do that. I ended up giving up and decided it was worth posting a picture of. I was thinking of making drawstring bags but I didn't want to use the new cord from Japan also. I am so possessive about that cord since it's my favorite of all cords.