Adidas men's ultraboost 21 marathon running shoes/sneakers FY0848 Size 6 & 12.5 available. Select your size choice. - New with tags, with box - Color: Solar Yellow/Solar Yellow/Screaming Pink The adidas Ultraboost 21 for both men and women are neutral, all-round running shoes. The Ultraboost is an ideal shoe for your daily runs in urban or more rural areas.