The latest adidas Ultraboost 21 Mens Running Shoes see & apos;s a radical redesign of the neutral runner. This latest development see & apos;s 6% more Boost Capsules in the full length midsole for explosive energy return in each step. The adidas LEP replaces the original Torsion System delivering a 15% increase in forefoot bending stiffness. Finally the Primeknit+ upper is made with Primeblue - a high performance recycled material made in part with Parley Ocean plastic.