Amazon.com: Birkenstock 1020104336 Callan Gray Taupe Sd N 36 。Birkenstock Callan slip-on shoes feature a minimalist design with a premium suede leather upper and a collapsible heel for versatile wear. Built on the signature anatomically shaped cork-latex footbed, these shoes provide exceptional support and comfort. The Gray Taupe colorway offers a neutral, earthy tone that pairs easily with casual attire, while the durable synthetic sole ensures reliable traction. Elastic gore inserts allow for an easy, secure fit, making these an ideal choice for everyday comfort. Measurements: • Heel Height: 1\" • Platform Height: 0.75\"