Raise The Bar Take a new approach to speed with the adidas ZX 1K Boost. Its winterized sole and suede overlays keep you warm on chilly days while the EVA midsole with Boost technology ensures superior cushioning. Double-up on comfort with the ZX 1K Boost. adidas ZX 1K Boost Features: 20% pieces used to make the upper are made with minimum 50% recycled content Knit upper with suede overlays and reflective underlays Textile lining Lace-up closure EVA midsole with Boost cushioning