ADIDAS ULTRABOOST 21 'GREY'

The UltraBoost 21 'Grey' is a modern performance runner with a neutral look. The shoe's knit upper is built with Primeblue, which incorporates Parley Ocean Plastic, finished in grey and supported by a Three-Stripes lacing cage and external heel counter, both finished tonally. Underfoot, a contrasting white Boost midsole includes 6% more Boost capsules than the UltraBoost 20, while a Linear Energy Push system is included for energy return.