With technology that transforms to comfort, the adidas Running Ultraboost 21 has an innovative new Torsion System that provides a 15% increase in forefoot bending stiffness for a more responsive run. This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 6% more Boost capsules ready to explode with energy in each step. Sock-like fit. adidas Primeknit+ upper. Supportive heel counter. Stretchweb outsole with Continentalâ„¢ Rubber. Textile and synthetic upper. Man-made lining, insole and outsole. Imported. Measurements: Weight: 11 oz Product measurements were taken using size 7, width B - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.
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