British artist Tom Price created these "meltdown chairs" out of polypropylene rope by heating and pressing a seat-shaped form into the material.
This chair is created by heating and pressing a seat-shaped former into a ball of polypropylene rope. The rope begins to liquify as it comes into contact with the heated former and, as it cools, it sets
in the shape of a seat creating a contrast in form and texture to the remaining rope. No additional material has been added to make the seat - it is all made from melted rope.
http://tom-price.com/Meltdown_chair%20PP%20Blue.htm | Video of how it's done [YouTube] - via KanYe West Blog