This edition of the adidas Ultra Boost Uncaged combines the sock-like fit of the Primeknit upper, finished in a blend of Shock Red, Ray Red, and Ray Pink, with the responsive cushioning of a full-length Boost midsole. adidas’ Torsion System in the midfoot works with the upper to support the foot’s natural movement, while the Stretchweb rubber outsole provides traction in all directions.