Flocking a Christmas tree is the process of coating the branches of a tree with fake snow or flocking spray to give the tree a frosty, wintery look. This can be done by spraying the tree with flocking spray, which is a mixture of tiny pieces of white foam or synthetic material and glue. The flocking spray will adhere to the tree branches, creating a thick layer of "snow" that can be dusted off if necessary. The flocking can also be applied using a flocking machine, which shoots out tiny pieces of foam or synthetic material that stick to the branches.