The Energy Boost runner made its debut in February 2012, marking the introduction of Boost technology in footwear. This revolutionary technology, featuring Infinergy infusion, offered superior energy storage and return compared to traditional midsole materials available at that time. With the Wmns UltraBoost Uncaged 'Carbon' sneaker, Adidas builds upon this remarkable foundation by combining Primeknit, Boost, and Torsion innovations. Specifically designed for women, this shoe eliminates the Three-Stripes cage, allowing for an enhanced, unrestricted movement experience.