The Adidas Ultraboost 23 Running Shoes allow you to feel good, run faster, and beat your best time. It is a repeating sequence. Boost your run with the Ultraboost 23 running shoe. It's the lightest and most responsive Ultraboost to date, and it's built using a manufacturing process that has a lower environmental footprint than previous versions. The Light BOOST midsole with the latest generation adidas BOOST technology provides greater energy return with each stride.