3.5" heel and 1/2" platform made of recycled plastic. Foam padded insole. Kid suede and PU coated calf leather uppers, calf leather lining, eco-leather composite sole. Butterfly Mark and LWG Gold certified (see sustainability tab for more info). Platform can be worn with all Alterre straps, Marilyn strap can be worn with most Alterre shoe bases. Available in regular full sizes 6 - 10 (see sizing guide for best fit). Fits snug at first but leather loosens to mold to your feet over time. 5% of profits donated to Restore NYC to help fight sex-trafficking.