PRIMEKNIT textile upper Lace closure Fitcounter molded heel counter BOOST midsole Stretchweb outsole with Continental Rubber Get Ready To Take Your Performance To The Next Level With These Adidas Ultraboost Shoes. With Boost Technology, Your Feet Will Get The Power They Need To Move Faster And Farther. The Casual Styling Makes Them Perfect For Street Wear, While The Energy Capsules Give You An Extra Boost Of Energy While Running.