Women's ADIDASA(R) ULTRA BOOST X :: Feel the cushioned bounce of thousands of tiny boost(TM) energy capsules in the Women's adidas ULTRA BOOST X. Designed just for women, you'll appreciate the adaptive arch and the comfy Primeknit upper that adapts to your foot shape through every stride. Plus, your ULTRA BOOST X maximizes the energy-giving benefits of boost with a flexible STRETCHWEB outsole.