Birkenstock Women's Licorice Alyssa Licorice Sandal, Licorice, 40 Synthetic Heel measures approximately 1.25 inches" Birko-Flor Upper - Made of acrylic and polyamide felt fibers EVA outsole provides shock absorption Deep heel cup cradles the heel and keeps natural cushioning right under the heel bone Natural Cork Footbed provides arch support Raised toe bar encourages natural gripping motion of your feet