adidas Pureboost 21 Shoes femaleFor quick morning miles and more. These adidas Pureboost performance running shoes are so simple, you’ll want to wear them beyond your daily run. With responsive BOOST, the comfort is clear as soon as you slip them on. The soft knit upper comes with an external heel counter, which locks your foot in place as you run down that last hill.Lace closure. Textile upper.BOOST midsole.