The Birkenstock® Yao slide sandal makes your on-the-go weekends a breeze! Easy care Birko-Flor™ upper is made of acrylic and polyamide felt fibers with a leather-like texture on top and a soft fabric underneath against the skin. A raised toe bar encourages the natural gripping motion of your feet. Neutral heel profile and deep heel cup cradles the foot and distributes body weight more evenly.