The time of covering textbooks with paper bags and plastic is now a thing of the past. Book Sox is made of stretchable fabric that changes color when touched, since the cover is made of heat-sensitive fabric.

You simply open the book face down. Bring the book cover straight up and apply the cover to each side. Then push the center of the cover to the binding and then close the book cover. Voila! You got yourself a new book cover. Isn't that cool?!

Why didn't they invent this thing when I was still in grade school. When I had to cover 10 books, plus 12 notebooks, plus my sisters' books and notebooks (that makes it 66 pieces in total!). I would've saved so much time, paper, plastic and tape.

Here's a demo that I found in Youtube showing how cool the heat-sensitive cover is. I just can't get over it :D