It's Magic Bag Blendo
The performer displays four large silks colored black, white, red and yellow and an empty blue bag.
The bag is shown inside and out, and is seen to be of the same color. The silks are dropped in the bag and the bag is snapped. In an instant the bag transforms into a very large 36" foulard, in a pattern of the four silks with the message "ITS MAGIC".
The Bag is made from a heavy satin material to ensure smooth working. Comes complete with required silks and instructions.