Ultra boost Uncaged features a minimalistic design, that offers less restriction and an improved running experience. These neutral running style shoes features no internal support frame, to allow for minimum restrictions. The upper is made from Primeknit offering maximum breathability and a personal fit. The shoes has been given an anatomical socklike design, adding to the comfort. Ultra Boost Uncaged is equipped with adidas' revolutionizing Boost midsole, designed to ensure an efficient energy transfer with every step you take. The Boost technology is created with small polyurethane "capsules", that are moulded together in the sole. They work by absorbing the energy from the shock absorption that you generate, and afterwards convert it to energy in your steps and gives you great momentum. Furthermore the shoe is designed with the TORSION SYSTEM that offer stability around the midfoot, and helps keep the feet level. The Fitcounter heelcap offers stability around the heel.