Boost is a sole technology developed by Adidas that provides superior cushioning and comfort. It is widely used in many Adidas sneakers, such as the Ultra Boost and YEEZY BOOST models, and is highly sought-after by sneaker enthusiasts. Boost technology was first introduced by Adidas in 2013 as a way to improve the cushioning and energy return of their sneakers. It is made up of thousands of small, thermoplastic polyurethane (TPU) beads that are molded together to form the sole of the shoe. These beads compress and expand as the wearer runs or walks, providing a responsive, "bouncy" feeling underfoot. Boost soles are also known for their durability and ability to maintain their cushioning over time. The technology has been used in a wide range of Adidas sneakers, including running shoes, lifestyle shoes and even performance sneakers like the Ultra Boost. It is highly appreciated by sneaker enthusiasts because of its comfort and its energy return.