Products Description The Performa was designed primarily for indoor use during fitness training, Cross Fit, and for after sport. The sole is not designed for extended use during outdoor activities like trekking, running, or water sports. Performa IS BEST FOR: Fitness Training, Indoor Cross Fit, Travel, & After Sport. Colour:Black The Vibram Women's Fivefingers Perfoma Black belongs to the Performa series which is new from Vibram. This series is designed to enhance that barefoot feeling. The Vibram rubber sole offers maximum feel and flexibility without sacrificing slip resistance.