adidas ULTRABOOST 21 Running Shoes | Grey Three | Women's
ENERGY WAS JUST ENERGY UNTIL ENERGY MET ULTRABOOST 21. Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. SPECIFICATIONS Sock-Like Fit [Added Comfort w/o Tongue] Lace Closure adidas Primeknit+ Upper [Soft, Lightweight Fabric] Textile Lining Supportive Heel Counter [Bounce-Back Feel] Boost Midsole [Comfort + Stability] Stretchweb Outsole w/ Continental™ Rubber [Traction + Grip] Materials: Primeblue [Recycled Polyester Created Using Intercepted Plastic/Materials in Marine Communites - Increased Sustainability] Midsole Drop: 10mm [Heel: 30.5mm / Forefoot: 20.5mm]