VIBE Boost ShoesWith a flexible fit for the studio, the adidas by Stella McCartney VIBE Boost shoes pair a form-fitting seamless knit upper with the charged-up feel of boostâ„¢. An adjustable ankle collar lets you customize the fit.boost™'s energy-returning properties keep every step charged with an endless supply of light, fast energyKnitted upper with a mix of texturesAdjustable strap on forefootInner socklining visible above ankleadidas by Stella McCartney logo on outside heelRubber outsoleImported