adidas and fashion designer Stella McCartney take athleisure wear from the pavement to the runway with the launch of the Wmns UltraBoost X 'Core White' sneaker. This ladies’ shoe is equipped with a sock-like Primeknit upper with locked down Velcro straps in a women's-specific fit. Underfoot, a compression fit, adaptive arch supports the foot. Its Boost midsole, first seen in 2012, is outfitted with Infinergy, encouraging bouncier strides.