What is rob holding hair?

As an AI language model, I do not have access to personal information about individuals like Rob Holding, who is a professional football player for Arsenal F.C. However, I can tell you that his distinctive hairstyle consists of a short, cropped cut on the sides and back of his head with longer hair on top styled in a messy, textured manner. The style is popular among many young men and is often paired with a well-groomed beard or facial hair.