Suede uppers. TOMS leather products support responsible manufacturing via the Leather Working Group. TPR Outsole with TPU Toplift: A lightweight rubber that's flexible and provides traction with an elastic heel for added durability. Non-removable Custom CloudBound™ foam insoles for all-day comfort and support. Stacked leather-wrapped heel. Wedge height is approximately 2 3/4". Shaft height approximately 4 3/8". Back zipper closure. Your TOMS purchase helps support children's education, health and well-being, giving kids everywhere the gift of better tomorrows.