Why is it good for this plant? Perlite is of volcanic origin, so it is an excellent thermal insulator. It also helps the rooting of the branches.

The appearance is very similar to that of polystyrene balls, in fact, perlite is white and very light, it does not even alter the pH of the orchid . Nurseries use it to promote the growth and development of the plant, because it allows correct reception of water and facilitates the respiration of the roots, since it is not compacted like soil and therefore it is impossible for water to stagnate.