PRIMEKNIT upper Lace up closure BOOST on the midsole Stretchweb outsole Continental rubber From A Walk In The Park To A Weekend Run With Friends, These Adidas Ultraboost 1.0 Shoes Are Designed To Keep You Comfortable. An Adidas Primeknit Upper Gently Hugs Your Feet, And Boost On The Midsole Cushions From The First Step To The Last Mile. The Stretchweb Outsole Flexes Naturally For An Energized Ride While Continental Rubber Gives You The Traction You Need To Keep That Pep In Your Step.