Black Adidas ultraboost 21 with blue oxide iridescent soles. The sole changes from a gray, blue, purple, greenish color as light hits it. I tried to capture in the video. Super comfortable! Shoes are barely used in almost new condition. Note, I don’t have the inserts. I used special running inserts and lost the original ones. You can find inserts for as low as $10 at a drugstore or online.