Birkenstock Siena Big Buckle Women's Sandal NW/OB

The Birkenstock Women's Siena Big Buckle is an elegant, fashion-forward reinterpretation of the classic two-strap sandal — swapping the traditional parallel straps for chic crossover straps anchored by an oversized, elegant pin buckle that serves as a striking eye-catcher on an otherwise understated, refined silhouette. The upper is crafted from high-quality soft nubuck leather — gently buffed top-grain leather that is soft to the touch and develops a beautiful patina over time — or richly textured oiled leather that takes on a perfectly lived-in look and ages beautifully with wear, depending on colorway. What sets the Siena apart is its Semi-Exquisite footbed construction, in which the contoured footbed is wrapped in luxuriously smooth, color-matched leather for a premium touch you'll feel the moment you step in. Beneath that refined surface lies the original Birkenstock contoured cork-latex footbed, with its signature very deep heel molding that holds the heel bone firmly in its natural position, a raised toe bar that encourages the natural gripping motion of the foot to exercise the legs and aid circulation, and inner and outer longitudinal arch supports that surround the tarsal bones — together delivering nearly as much support in a sandal as in a closed shoe. A functional adjustable Big Buckle strap allows for a flexible, personalized fit, while a lightweight EVA sole grounds the sandal with cushioned, easygoing walkability. Made in Germany in a Narrow (B) width in colorways including Black nubuck, Black oiled leather, Dusty Blue, and Dove Gray at an MSRP of approximately $164.95, the Siena Big Buckle fits true to size — with a recommendation to order the next size up if between sizes.