How do I get my horse's mane to look like this?

When you have to brush it, use lots of conditioner/detangler so you're not ripping out hair. Keep the hair braided, or even in mane bags so it doesn't get rubbed off. However, some breeds have naturally longer and thinker manes than others, so don't think you can just not brush your horse's mane and he'll have a 2 foot long mane magically.. I wish it was that easy :)