Suede uppers. TOMS leather products support responsible manufacturing via the Leather Working Group. Non-removable, high-rebound comfort OrthoLite® Eco X40-Hybrid™ insole made with 32% eco content including 15% hybrid materials, 12% bio-oil and 5% recycled rubber. Medial side zip for easy on and off. Stacked, leather-wrapped block heel. Heel height is approximately 2 ¾”, shaft height is approximately 4". Your TOMS purchase helps support children’s education, health and well-being, giving kids everywhere the gift of better tomorrows.