Similar to the Performa, the FiveFingers Performa Jane is also designed to enhance that barefoot feeling, while offering a more secure fit for active use. The kangaroo leather upper is soft against the bare foot, yet strong and tear resistant, with outstanding breathability. The 7-part Vibram rubber sole offers maximum feel and flexibility without sacrificing slip resistance. The Performa Jane was designed primarily for indoor use during fitness training, Cross Fit, and Yoga & Pilates. The sole is not designed for extended use during outdoor activities like trekking, running, or water sports.