I bought the black mid sole paint marker.
At first I was abit sceptical about it, but I am a changed man. They are so easy to use, I have painted 4 pairs of my Ultraboosts 4 coats on the mid soles of each shoe and I still have so much paint left in my pen.
Every sneaker head needs this pen.
It has made my boring white sole ultraboost into an amaizing pair of shoes now.