The adidas Wmns UltraBoost 4.0 is engineered for performance in an adaptive design injected with the brand's signature tech. Released in April 2019, this women's 'Black Orchid' model reissues the supportive Primeknit bootie with a contrast Fitcounter heel and Three-Stripes midfoot cage. This update goes the distance on a full-length Boost midsole layered over a flexible Stretchweb and Continental rubber outsole.